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Movement of Substances in and
out of Cells
Question Paper
Level
Subject
Exam Board
Unit
Topic
Difficulty Level
Booklet
Time Allowed:
GCSE
Biology
AQA
B3
Movement of Substances in and out of cells
Bronze Level
Question Paper
182 minutes
Score:
/182
Percentage:
/100
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Q1.Our lungs help us to breathe.
The image below shows the human breathing system.
(a)
(i)
Name part A.
...............................................................................................................
(1)
(ii)
Give one function of the ribs.
...............................................................................................................
(1)
(b)
(i)
Use the correct answer from the box to complete the sentence.
active transport
diffusion
osmosis
Oxygen moves from the air inside the lungs into the blood by the
process of .................................................... .
(1)
(ii)
Use the correct answer from the box to complete the sentence.
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arteries
capillaries
veins
Oxygen moves from the lungs into the blood through the walls
of the .................................................... .
(1)
(iii)
Inside the lungs, oxygen is absorbed from the air into the blood.
Give two adaptations of the lungs that help the rapid absorption of oxygen into
the blood.
1 ...........................................................................................................
..............................................................................................................
2 ...........................................................................................................
..............................................................................................................
(2)
(Total 6 marks)
Q2.Plants need different substances to survive.
Figure 1 shows the roots of a plant.
(a)
(i)
Mineral ions are absorbed through the roots.
Name one other substance absorbed through the roots.
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...............................................................................................................
(1)
(ii)
The plant in Figure 1 has a higher concentration of mineral ions in the cells of
its roots than the concentration of mineral ions in the soil.
Which two statements correctly describe the absorption of mineral ions into
the plant’s roots?
Tick ( ) two boxes.
The mineral ions are absorbed by active transport.
The mineral ions are absorbed by diffusion.
The mineral ions are absorbed down the concentration gradient.
The absorption of mineral ions needs energy.
(2)
(iii)
The plant in Figure 1 has roots adapted for absorption.
Figure 2 shows a magnified part of a root from Figure 1.
Describe how the root in Figure 2 is adapted for absorption.
...............................................................................................................
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...............................................................................................................
...............................................................................................................
...............................................................................................................
(2)
(b)
The leaves of plants have stomata.
What is the function of the stomata?
........................................................................................................................
........................................................................................................................
(1)
(c)
Figure 3 shows the underside of two leaves, A and B, taken from a plant in a man’s
house.
(i)
In Figure 3, the cells labelled X control the size of the stomata.
What is the name of the cells labelled X?
Tick ( ) one box.
Guard cells
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Phloem cells
Xylem cells
(1)
(ii)
Describe how the appearance of the stomata in leaf B is different from the
appearance of the stomata in leaf A.
...............................................................................................................
...............................................................................................................
(1)
(iii)
The man forgets to water the plant.
What might happen to the plant in the next few days if the stomata stay the
same as shown in leaf A in Figure 3?
...............................................................................................................
...............................................................................................................
(1)
(Total 9 marks)
Q3.Substances can move into cells and out of cells.
(a)
Draw a ring around the correct answer to complete each sentence.
active transport.
Water moves into cells and out of cells by
osmosis.
reabsorption.
freely permeable
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The water moves through a
non-permeable
membrane.
partially permeable
(2)
(b)
Students put plant cells into two different strengths of sugar solutions, A and B.
The diagram below shows what the cells looked like after 1 hour.
Cell in
sugar solution A
(after 1 hour)
(i)
Cell in
sugar solution B
(after 1 hour)
Describe two ways in which the cell in sugar solution B is different from the
cell in sugar solution A.
1 ............................................................................................................
...............................................................................................................
2 ............................................................................................................
...............................................................................................................
(2)
(ii)
A student put red blood cells into water.
Suggest what would happen to the cells.
...............................................................................................................
...............................................................................................................
...............................................................................................................
(1)
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(c)
In the human body, glucose is absorbed into the blood from the small intestine.
The small intestine contains many villi.
Which two of the following help the absorption of glucose in the small intestine?
Tick ( ) two boxes.
Villi have a cell wall.
Villi are covered in thick mucus.
Villi give the small intestine a large surface area.
Villi have many blood capillaries.
(2)
(Total 7 marks)
Q4.A person’s kidneys stop working. The person may be treated using a dialysis machine.
Some students made a model of a dialysis machine.
Figure 1 shows the students’ model.
Figure 1
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The fake blood contained:
•
water
•
sodium ions
•
urea
•
glucose
•
protein.
(a)
(i)
Suggest why the students kept the water in the beaker at 37 °C.
...............................................................................................................
...............................................................................................................
(1)
(ii)
The dialysis tubing separates the fake blood from the water in the test tube.
Figure 2 shows the fake blood, the dialysis tubing and the water in the test
tube.
Figure 2
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After 1 hour, the students tested the water in the test tube to see which
substances had filtered through from the fake blood.
Name one substance that the students would find in the water in the test tube
after 1 hour.
...............................................................................................................
(1)
(iii)
Give a reason for your answer to part (a)(ii).
...............................................................................................................
...............................................................................................................
...............................................................................................................
(1)
(iv)
In hospitals, dialysis machines use dialysis fluid, not pure water.
Dialysis fluid contains the same concentration of useful substances as the
blood.
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Which substance is at the same concentration in dialysis fluid as in blood?
Tick ( ) one box.
Glucose
Insulin
Oxygen
(1)
(b)
When the kidneys stop working, the person can be treated by a continuous process
called CPD.
In CPD:
•
dialysis fluid is put into the abdomen
•
the fluid is changed four times a day at home
•
changing the fluid takes about 45 minutes.
Suggest two advantages of having CPD instead of treatment on a dialysis machine.
1 .....................................................................................................................
........................................................................................................................
2 .....................................................................................................................
........................................................................................................................
(2)
(Total 6 marks)
Q5.Substances can move into and out of cells.
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(a)
(i)
How does oxygen move into and out of cells?
Draw a ring around one answer.
diffusion
digestion
photosynthesis
(1)
(ii)
Diagram 1 shows the percentage concentration of oxygen in three cells, A, B
and C.
Diagram 1
Oxygen can move from cell to cell.
Into which cell, A, B or C, will oxygen move the fastest?
(1)
(b)
(i)
How does water move into and out of cells?
Draw a ring around one answer.
breathing
osmosis
respiration
(1)
(ii)
Differences in the concentration of sugars in cells cause water to move into or
out of cells at different rates.
Diagram 2 shows three different cells, P, Q and R.
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The information shows the percentage concentration of sugar solution
in cells P, Q and R.
Diagram 2
Water can move from cell to cell.
Into which cell, P, Q or R, will water move the fastest?
(1)
(Total 4 marks)
Q6.Villi are found in some parts of the digestive system.
Diagram 1 shows two villi.
Diagram 1
(a)
Draw a ring around the correct answer to complete each sentence.
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muscle.
(i)
Structure A is a
nerve.
capillary.
(1)
dialysis.
(ii)
The villi absorb the products of digestion by
diffusion.
osmosis.
(1)
(b)
Diagram 2 shows the digestive system.
Diagram 2
(i)
In which part of the digestive system, X, Y or Z, are most villi found?
(1)
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(ii)
There are about 2000 villi in each cm2 of this part of the digestive system.
Why is it helpful to have lots of villi?
...............................................................................................................
...............................................................................................................
(1)
(Total 4 marks)
Q7.
The diagram shows an alveolus and a blood vessel in the lung.
(a)
Draw a ring around the correct answer to complete each sentence.
an artery.
(i) Blood vessel X is
a capillary.
a vein.
(1)
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diffusion.
(ii)
Gases pass across the wall of the alveolus by
evaporation.
fermentation.
(1)
(iii)
The table compares the concentrations of some gases in inhaled air and
exhaled air.
Complete the table.
Write ‘lower’ or ‘higher’ in each box.
One line has been completed for you as an example.
Concentration
Gas
Water vapour
Inhaled air
Exhaled air
lower
higher
Carbon dioxide
Oxygen
(2)
(b)
Draw a ring around the correct answer to complete each sentence.
blood plasma.
(i) Oxygen is carried in the blood mainly in
red blood cells.
white blood cells.
(1)
carbon dioxide.
(ii)
In the blood, the oxygen combines with
haemoglobin.
urea.
(1)
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(Total 6 marks)
Q8.
Plants lose water vapour from their leaves. Most of this water vapour is lost through
the stomata.
(a)
Draw a ring around the correct answer to complete the sentence.
distillation.
Plants lose water vapour by
filtration.
transpiration.
(1)
(b)
A class of students investigated the number of stomata per mm2 on the upper
surface and on the lower surface of the leaves of three species of plant, P, Q and R.
The students placed samples of the surface cells onto a grid on a microscope.
Student X counted the stomata on the lower surface of a leaf from one of the plant
species.
The diagram shows part of the grid that student X saw under the microscope.
(i)
Complete the calculation to estimate the number of stomata per mm2 on the
lower surface of this leaf.
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Number of stomata in
mm2 = .........................................................
Number of stomata in 1 mm2 = ............................................................
(2)
The table shows the mean results for the class.
Mean number of stomata per mm2 of leaf
Plant species
Upper surface of leaf
Lower surface of leaf
P
40
304
Q
0
11
R
85
195
(ii)
Student X had counted the stomata on the lower surface of a leaf from one of
the plant species.
Use your answer to part (b)(i), and information in the table, to help you to
answer this question.
From which plant species, P, Q or R, was student X’s leaf most likely to have
been taken?
(1)
(iii)
Species Q is normally found growing in hot, dry conditions.
Explain one way in which species Q is adapted for living in hot, dry conditions.
Use information from the table.
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
(2)
(Total 6 marks)
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Q9.
(a)
List A gives four structures in the human body.
List B gives the functions of some structures in the body.
Draw a straight line from each structure in List A to the correct function in List B.
List A – Structure
List B – Function
Surround and protect the lungs
Alveoli
Filter the blood
Veins
Carry blood towards the heart
Villi
Absorb digested food
Ribs
Allow oxygen to enter the blood
(4)
(b)
Draw a ring around the correct answer to complete the sentence.
diffusion.
In the lungs, oxygen enters the blood from the air by
filtration.
respiration.
(1)
(Total 5 marks)
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Q10.
(a)
Draw a ring around the correct answer to complete the sentence.
distillation.
A plant loses water from its leaves by a process called
respiration.
transpiration.
(1)
(b)
Some scientists investigated the effect of temperature on water loss from a plant.
The graph shows the results.
Describe the effect of increasing the temperature on water loss from the plant.
........................................................................................................................
........................................................................................................................
........................................................................................................................
........................................................................................................................
(2)
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(c)
Under different conditions, plants open or close their stomata.
(i)
How does closing its stomata help a plant?
...............................................................................................................
...............................................................................................................
(1)
(ii)
In the investigation described in part (b), which temperature range would
cause most of the stomata to close?
Draw a ring around one answer.
25 - 30 °C
30 - 35 °C
40 - 45 °C
(1)
(Total 5 marks)
Q11.
Substances can move into and out of cells.
(a)
(i)
How does oxygen move into and out of cells?
Draw a ring around one answer.
diffusion
digestion
photosynthesis
(1)
(ii)
Diagram 1 shows the percentage concentration of oxygen in three cells, A, B
and C.
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Oxygen can move from cell to cell.
Into which cell, A, B or C, will oxygen move the fastest?
(1)
(b)
(i)
How does water move into and out of cells?
Draw a ring around one answer.
breathing
osmosis
respiration
(1)
(ii)
Differences in the concentration of sugars in cells cause water to move into or
out of cells at different rates.
Diagram 2 shows three different cells, P, Q and R.
The information shows the percentage concentration of sugar solution in cells
P, Q and R.
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Water can move from cell to cell.
Into which cell, P, Q or R, will water move the fastest?
(1)
(Total 4 marks)
Q12.
Villi are found in some parts of the digestive system.
Diagram 1 shows two villi.
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(a)
Draw a ring around the correct answer to complete each sentence.
muscle.
(i) Structure A is a
nerve.
capillary.
(1)
dialysis.
(ii)
The villi absorb the products of digestion by
diffusion.
osmosis.
(1)
(b)
Diagram 2 shows the digestive system.
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(i)
In which part of the digestive system, X, Y or Z, are most villi
found?
(1)
(ii)
There are about 2000 villi in each cm2 of this part of the digestive system.
Why is it helpful to have lots of villi?
...............................................................................................................
...............................................................................................................
(1)
(Total 4 marks)
Q13.
The diagram shows part of the lining of the small intestine.
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(a)
(i)
Name structure X.
Draw a ring around one answer.
alveolus
thorax
villus
(1)
(ii)
Choose three ways in which structure X is adapted to help the absorption of
soluble food.
Tick (
) three boxes.
It is ventilated.
Its outer surface is one cell thick.
It has a large surface area.
It contains a layer of muscle.
It has a good blood supply.
Its cells contain haemoglobin.
(3)
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(b)
Name the process by which soluble food enters the blood.
Draw a ring around one answer.
diffusion
fermentation
transpiration
(1)
(Total 5 marks)
Q14.
The diagram shows part of a plant root. A large number of structures like the ones
labelled X grow out of the surface of the root.
(a)
(i)
What is the name of structure X?
Draw a ring around one answer.
root hair
stoma
villus
(1)
(ii)
Name two substances which structure X absorbs from the soil.
1 .....................................................................................................................
2 .....................................................................................................................
(2)
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(b)
The substances in (a)(ii) are transported from the roots to the leaves. Carbon
dioxide also enters the leaves.
Draw a ring round the correct answer to complete each sentence.
alveoli.
(i) Carbon dioxide enters leaves through
stomata.
villi.
(1)
active transport.
(ii) Carbon dioxide enters leaf cells by
diffusion.
reabsorption.
(1)
(Total 5 marks)
Q15.
People with asthma sometimes find it difficult to breathe.
Diagram 1 shows part of a human lung. Bronchioles are tubes that carry air to the alveoli.
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(a) Which letter, A, B or C, shows where oxygen enters the blood?
(1)
(b)
Diagram 2 shows a section through a bronchiole of a healthy person and of a
person suffering from asthma.
The person with asthma may find it difficult to breathe.
Use information from Diagram 2 to give the reason for this.
........................................................................................................................
........................................................................................................................
(1)
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(c)
A person has asthma. The bar graph shows the effect of the drug salbutamol on the
contraction of the muscle fibres in the wall of this person’s bronchioles.
(i)
Describe the effect of salbutamol on the person’s muscle fibres.
...............................................................................................................
...............................................................................................................
(1)
(ii)
How does salbutamol help this person?
...............................................................................................................
...............................................................................................................
(1)
(Total 4 marks)
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Q16.
The diagram shows a section through the chest.
For each question write the correct letter in the box.
Which structure, A, B, C or D, is:
(a)
a rib
(1)
(b)
the diaphragm
(1)
(c)
an alveolus?
(1)
(d)
Complete the following sentences.
(i)
When we breathe in the rib cage moves ...................... and the diaphragm
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becomes ...................... .
(2)
(ii)
Alveoli are adapted for absorbing ........................................................ .
(1)
(Total 6 marks)
Q17.
A marathon runner loses a lot of sweat during a race.
(a)
Complete the following sentence.
Sweat contains water and ..............................................................................
(1)
(b)
The table shows the concentration of glucose, ions and protein in four sports drinks,
A, B, C and D.
Runners drink sports drinks to replace the water lost in sweating. Replacing water is
called rehydration.
Scientists have shown that the ratio of the glucose concentration, in g per dm3, to the
ion concentration, in mg per dm3, in a drink affects the rate of rehydration.
The nearer this ratio is to 1:1, the faster the body rehydrates.
Drink
Glucose
in g per dm3
Ions
in mg per dm3
Protein
in g per dm3
Glucose to ion ratio
A
110
22
1.2
5:1
B
64
96
0.0
2:3
C
72
80
0.0
......................
D
138
23
0.2
......................
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(i)
Which drink, A, B, C or D, would give the runner most energy?
(1)
(ii)
Calculate the glucose to ion ratios for drinks C and D.
Write your answers in the table.
(2)
(iii)
Which drink, A, B, C or D, would rehydrate the runner the fastest?
(1)
(c)
The kidney controls the amount of water in the runner’s body.
The table shows:
•
the volume of water filtered from the blood
•
the volume of urine produced in one day.
Volume per day
in dm3
Water filtered from blood
Urine
180
2
Calculate the volume of water reabsorbed into the blood in one day.
........................................................................................................................
Volume of water that is reabsorbed ............................ dm3
(1)
(d)
On a hot sunny afternoon:
•
man A sat in the shade, drinking beer
•
man B went jogging in the desert.
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Complete the table to compare the volume and concentration of urine produced by
the kidneys of the two men.
Tick ( ) one box on each row.
The
same
Compared with Man A
Higher
Lower
the volume of urine produced by man B would be
the concentration of urine produced by man B’s kidneys
would be
(2)
(Total 8 marks)
Q18.
In fish and chip shops, potatoes are cut into chips several hours before the chips are
cooked.
The amount of water in the chips must be kept constant during this time.
To keep the water in the chips constant, the chips are kept in salt solution.
A student investigated the effect of different concentrations of salt solution on the mass of
five chips.
•
He weighed each one of the five chips.
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•
He placed each chip into a different concentration of salt solution.
•
After one hour he removed the chips from the salt solutions and then reweighed the
chips.
Concentration of salt solution
0M
0.5 M
1M
2M
3M
Mass of chip at start, in grams
2.6
2.8
2.8
2.5
2.6
Mass of chip after one hour,
in grams
2.7
2.8
2.7
2.3
2.1
(a)
(i)
In which concentration of salt solution did the chip gain mass? .................
(1)
(ii)
Explain why the chip gained mass in this solution.
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
(2)
(b)
In which concentration of salt solution should the chips be kept in the shop?
Give the reason for your answer.
........................................................................................................................
........................................................................................................................
........................................................................................................................
........................................................................................................................
........................................................................................................................
(2)
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(Total 5 marks)
Q19.
Four leaves were removed from the same plant. A waterproofing agent was spread
onto some of the leaves, as follows:
•
leaf A on both surfaces
•
leaf B on the lower surface only
•
leaf C on the upper surface only
•
leaf D on neither surface.
Each leaf was then placed in a separate beaker, as shown in Diagram 1.
Each beaker was weighed at intervals.
The results are shown in the graph.
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(a)
Give evidence from the graph when answering the following questions.
(i)
Which leaf, A, B, C or D, loses water most rapidly?
Evidence ...............................................................................................
...............................................................................................................
(1)
(ii)
Is water lost from both surfaces of the leaf?
Draw a ring around your answer. Yes / No
Evidence ...............................................................................................
...............................................................................................................
(1)
(b)
Diagram 2 shows the appearance of each surface of the leaf as seen through a
microscope.
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(i)
Name the spaces labelled X ................................................................
(1)
(ii)
Use information in Diagram 2 to explain why the results are different for
leaves B and C.
...............................................................................................................
...............................................................................................................
...............................................................................................................
...............................................................................................................
(2)
(Total 5 marks)
Q20.
The diagram shows the human breathing system.
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(a)
On the diagram, label structures A and B.
Choose your answers from the words in the box.
alveolus
capillary
diaphragm
rib
(2)
In the lungs, oxygen passes from the air into the blood.
Carbon dioxide passes from the blood into the air.
(b)
Which letter, A, B, C or D, shows where oxygen enters the blood?
(1)
(c)
When oxygen enters the blood it combines with haemoglobin.
Draw a ring around the correct word or phrase to complete each sentence.
plasma
(i)
Haemoglobin is found in the red blood cells
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white blood cells
(1)
plasma
(ii)
Most of the carbon dioxide is carried by the
red blood cells
.
white blood cells
(1)
(Total 5 marks)
Q21.
The photograph shows part of the surface of a plant root. This part of the root is
covered with hundreds of structures like the one labelled X.
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(a)
What is the name of structure X?
Draw a ring around one answer.
root hair
stoma
villus
(1)
(b)
(i)
Use the scale to measure the length Y–Z on the photograph.
On the photograph, length Y–Z = .................................... mm.
(1)
(ii)
The photograph shows the root magnified 100 times.
Calculate the actual length Y–Z.
...........................................................................................................................
...........................................................................................................................
...........................................................................................................................
Actual length Y–Z = ........................................mm.
(2)
(iii)
Structure X is very small. There are thousands of structures like X on a plant
root.
How does this help the plant?
...........................................................................................................................
...........................................................................................................................
...........................................................................................................................
...........................................................................................................................
(2)
(Total 6 marks)
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Q22.
The diagram shows the human breathing system.
(a)
On the diagram, label structures B and C.
Choose your answers from the list in the box.
alveoli
diaphragm
rib
trachea
(2)
(b)
(i)
Which letter, A, B, C or D, shows the site of gas exchange? ...........................
(1)
(ii)
Which one of the following gases has a higher concentration in exhaled air
than in inhaled air?
Draw a circle around one answer.
carbon dioxide
nitrogen
oxygen
(1)
(Total 4 marks)
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Q23.
(a)
The diagram shows a section through a plant leaf.
Water evaporates from cell X.
(i)
On the diagram, draw an arrow to show how water vapour from cell X gets
out of the leaf.
(1)
(ii)
Name the process by which water vapour is lost from a leaf.
Draw a circle around one answer.
osmosis
transpiration
wilting
(1)
(b)
The graph shows how much water was lost from a plant at different times of the
day.
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(i)
During which 2-hour period was water lost most quickly?
...........................................................................................................................
(1)
(ii)
Give one possible explanation why water was lost most quickly at this time.
...........................................................................................................................
...........................................................................................................................
...........................................................................................................................
...........................................................................................................................
(2)
(Total 5 marks)
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Q24.
Emphysema is a lung disease.
(a)
The drawings show sections through the lung of a healthy person and through the
lung of a person with emphysema. The drawings are drawn to the same scale.
Use information from the drawings to answer the questions.
What effect does emphysema have on:
(i)
the thickness of the surface used for gas exchange
...........................................................................................................................
...........................................................................................................................
(1)
(ii)
the total area available for gas exchange?
...........................................................................................................................
...........................................................................................................................
(1)
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(b)
Two men did the same amount of exercise.
One man was in good health. The other man had emphysema.
The results are shown in the table.
Man with
good health
Man with
emphysema
Oxygen entering blood in dm3 per minute
2.1
1.1
Air flow into lungs in dm3 per minute
90.7
46.0
The man in good health was able to take more oxygen into his blood than the man
with emphysema.
Calculate how much more oxygen was taken into the blood per minute by the man
in good health. Show your working.
.....................................................................................................................................
.....................................................................................................................................
Answer = ....................................................... dm3 per minute
(2)
(Total 4 marks)
Q25.
In fish and chip shops, potatoes are cut into chips several hours before they are
cooked.
The amount of water in the chips must be kept constant during this time.
To keep the water in the chips constant, the chips are kept in salt solution.
A student investigated the effect of different concentrations of salt solution on the mass of
chips.
•
He weighed each of five chips.
•
He placed each chip into a different concentration of salt solution.
•
After one hour he removed the chips, then reweighed them.
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His results are shown in the table.
Concentration of salt
solution
0M
0.5 M
1M
2M
3M
Mass of chip at start in
grams
2.6
2.8
2.8
2.5
2.6
Mass of chip after one
hour in grams
2.7
2.8
2.7
2.3
2.1
(a)
(i)
In which concentration of salt solution did the chip gain mass?
........................ M
(1)
(ii)
Complete the sentence by drawing a ring around the correct answer in the
box.
digestion
The chip gained mass because water entered by
osmosis
respiration
(1)
(b)
In which concentration of salt solution should the chips be kept?
........................ M
Give a reason for your answer.
....................................................................................................................................
....................................................................................................................................
(2)
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(c)
How could the student have made his investigation more reliable?
....................................................................................................................................
....................................................................................................................................
(1)
(Total 5 marks)
Q26.
The diagram shows a small part of a lung.
(a)
The arrow on the diagram shows the movement of oxygen from the air in the
alveolus to cell X.
Complete the sentences by drawing a ring around the correct answer.
(i)
Cell X is a platelet
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red cell
white cell
(1)
diffusion
(ii)
Oxygen moves from the air in the alveolus into cell X by
filtration
respiration
(1)
glycogen
(iii)
The substance in cell X that combines with oxygen is called haemoglobin
lactic acid
(1)
a cell membrane
(iv)
Cell X does not have cytoplasm
a nucleus
(1)
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(b)
On the diagram, draw an arrow to show the movement of carbon dioxide during
gas exchange.
(1)
(Total 5 marks)
Q27.
Long distance runners are advised to take several drinks during a race.
The table gives the composition of two drinks, Isotonic and Cola.
Drink
Sugar
concentration in
grams per litre
Sodium ion
concentration in
mmol per litre
Chloride ion
concentration in
mmol per litre
Isotonic
73
24
12
Cola
105
3
1
Explain why Isotonic would be the best drink for a long distance runner on a hot day.
..............................................................................................................................................
..............................................................................................................................................
..............................................................................................................................................
..............................................................................................................................................
(Total 2 marks)
Q28.
The diagram shows the human breathing system.
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(a)
Place on the diagram:
(i)
a letter X where oxygen enters the blood;
(1)
(ii)
an arrow showing the direction the diaphragm moves when we breathe in.
(1)
(b)
List the following structures in the order the air passes through them when we
breathe in.
alveoli
bronchi
bronchioles
trachea
1 ..................................................................................
2 ..................................................................................
3 ..................................................................................
4 ..................................................................................
(1)
(c)
By what process does oxygen enter the blood? Draw a ring around your answer.
diffusion
digestion
osmosis
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(1)
(Total 4 marks)
##
A runner might drink a special ‘sports drink’ at intervals during a marathon race. The table
shows the substances present in a sports drink.
Substance
Percentage
Water
Sugar
5.0
Ions
0.2
(a)
Complete the table to show the percentage of water in the sports drink.
(1)
(b)
The runner sweats and also breathes heavily during the race.
(i)
Why does the runner need to sweat?
...........................................................................................................................
(1)
(ii)
Which two substances in the table are lost from the body in sweat?
...........................................................................................................................
(1)
(iii)
Which substance in the table is lost from the body during breathing?
...........................................................................................................................
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(1)
(c)
How does the sugar in the sports drink help the athlete during the marathon?
.............................................................................................................................
........
.............................................................................................................................
........
(2)
(Total 6 marks)
Q30.
The diagram shows an alveolus and a blood capillary in the lung.
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(i)
During gaseous exchange, oxygen and carbon dioxide are exchanged across the
wall of the alveolus. On the diagram, carefully draw two arrows to show the paths
taken by oxygen and by carbon dioxide during this process. Label each arrow.
(3)
(ii)
Name the process by which oxygen moves across the wall of the alveolus.
.....................................................................................................................................
.....................................................................................................................................
(1)
(iii)
Each lung contains about 350 million alveoli. How does this help gaseous
exchange?
.....................................................................................................................................
.....................................................................................................................................
(1)
(Total 5 marks)
Q31.Complete the table by writing the correct process next to its description.
Choose your answers from the list in the box
breathing
diffusion
digestion
osmosis
Description
respiration
Process
Moving air in and out of the lungs
The movement of particles of a
substancefrom high to low concentration
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The release of energy from glucose
(Total 3 marks)
Q32.
The table gives information about a geranium plant and a cactus plant.
The geranium grows in gardens in the UK. The cactus grows in hot deserts.
Feature
Geranium
Cactus
5
15
1800
150
Percentage of water storage tissue in stem
50
85
Number of stomata per mm2
59
13
daylight
at night
0.2
5
Thickness of waxy cuticle in micrometres
Total leaf surface area in cm2
Time of day when stomata open
Horizontal spread of roots in metres
Using only information in the table, explain how the cactus is better adapted for living in
hot, dry conditions.
To gain full marks in this question you should write your ideas in good English. Put them
into a sensible order and use the correct scientific words.
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
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...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
(Total 5 marks)
Q33.
The diagram shows a part of a lung that is involved in gaseous exchange in a
human.
(i)
Draw and label, on the diagram, one arrow to show the direction of movement of
oxygen between the alveolus and capillary.
(1)
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(ii)
Draw and label, on the diagram, one arrow to show the direction of movement of
carbon dioxide, between the alveolus and capillary.
(1)
(iii)
Give the function of the red blood cell in this process.
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
(1)
(Total 3 marks)
Q34.
(a)
The graph shows how the mass of oxygen you breathe in changes as you
climb up a mountain.
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Describe, in as much detail as you can, how the mass of oxygen in one breath
changes as you climb from sea level to 3000 m.
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
(3)
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(b)
People who live high up in mountainous areas have more red blood cells than
people who live at sea level. The graph below shows how the number of red blood
cells changes with height above sea level.
(i)
How many more red blood cells does a person living at 3000 m above sea
level have than someone living at sea level? Show clearly how you work out
your answer.
...........................................................................................................................
...........................................................................................................................
Increase in number of red blood cells = ....................................millions per m3
(2)
(ii)
What is the advantage of having more red blood cells?
...........................................................................................................................
...........................................................................................................................
(1)
(Total 6 marks)
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Q35.
The diagram shows the human breathing system.
(a)
Complete the labels (i) and (ii).
(2)
(b)
Complete the following sentence.
When we breathe out, the mixture of gases which leaves the air sacs contains
more .............................. and less ......................................... than the mixture of
gases which enters the air sacs.
(2)
(Total 4 marks)
Q36.
The table shows the percentage of some gases in the air a boy breathed in and out.
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Gases
Air
breathed in
Air
breathed out
carbon dioxide
0.04%
4.0%
oxigen
20.0%
16.0%
water vapour
1.0%
6.0%
(a)
What happens in the lungs to change the levels of oxygen and carbon dioxide in
this way?
Oxygen .......................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
Carbon dioxide ...........................................................................................................
.....................................................................................................................................
.....................................................................................................................................
(4)
(b)
Compare the percentage of water vapour in the air breathed out with the
percentage in air breathed in.
.....................................................................................................................................
(2)
(Total 6 marks)
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