UNIT 2 AOS 1 TEST PRACTISE QUESTIONS
Name:__________________________
SECTION A: Answer True or False to the following Question
1
Homeostasis in living things is regulated by the action of the nervous system only
F
2
Sensory neurons carry information from the sense organs to the central nervous system
T
3
Each action potential that passes along the same neuron will be of equal intensity
T
4
Hormones act only on target cells, tissues or organs
T
5
The axon terminal of the presynaptic neuron adheres to the dendrites of the post synaptic neuron
F
6
Within a nerve pathway the impulse travels from axon to dendrites along each individual neuron
F
7
Hormones pass through ducts into the blood stream
F
8
All hormones are composed of protein
F
9
As the body loses water, the body fluids become less concentrated
F
10
Sunken stomata is an adaptation to very wet habitats
F
11
When mammals become dehydrated more antidiuretic hormone is secreted into the blood
T
12
ADH results in the production of a larger volume of more dilute urine than would be produced if
ADH was absent
F
13
Uric acid requires less ATP to produce than does Ammonia
F
14
Uric Acid is less toxic than either urea or ammonia
T
15
Roots display positive phototropism
F
16
Germinating seeds would show elevated levels of gibberellins compared to seeds that are not
germinating
T
17
Abscisic acid is the hormone that stimulates the closure of stomata when drought conditions arise
T
18
Abscisic acid produced by the apical bud inhibits development of the lateral buds
F
19
Ethylene stimulates fruit ripening and the abscission of leaves and fruit
T
SECTION B Select the best response from the statement offered for each question:
1.
The hormone responsible for geotropic response in plants is known as:
A
auxin
B
gibberellin
C
abscissic acid
D
cytokinin
2.
Phototropic responses of plants are caused by:
A
an auxin
B
illuminating one side of a plant more than the other
C
differential cell elongation
D
all of the above
3.
The growth response of the roots of a seedling to gravity can best be described as:
A
positive phototropism
B
positive geotropism
C
negative phototropism
D
negative geotropism
4.
If the apical region of a seedling is covered with tin foil and the seedling is exposed to light coming
from one direction only
A
the seedling will grow towards the light
B
the seedling will grow away from the light
C
the seedling will not grow at all
D
the seedling will grow straight up
5.
The production of ethylene gas is likely to be greatest in:
A
a germinating seed
B
a new flow bud
C
a ripe banana
D
an autumn leave
6.
In flowering plants
A
No metabolic activity occurs in seeds that are experiencing seed coat dormancy
B
Hormones can diffuse to nearby cells or be transported in the phloem to target tissues in other
parts of the plant
C
Gibberellins stimulate the flowering process
D
Plant hormones are complex protein molecules
7.
On a fine day a young sunflower plants always turns towards the sun; in other words it changes the
direction that it faces depending on where the sun is located.
Curvature is most likely due to
A
light induced inhibition of cell division in the stem
B
light induced differences in auxin distribution resulting in differences in stem cell enlargement
C
an unequal geotropic response
D
differences in the turgor of the stem cells due to transpiration
8.
The part of a neuron that sends information towards another cell is the:
A
axon
B
dendrite
C
myelin
D
cell body
9.
Homeostasis is best defined as:
A
The maintenance of a stable internal body temperature between narrow limits
B
The processes that maintain a fairly stable internal state despite fluctuations in the external
environment
C
The condition of a fairly stable internal state despite fluctuations in the external
environment
D
Keeping the internal environment of the body in a state very close to the external environment.
10.
Consider the components that constitute a reflex arc. Which of the following correctly matches that
structural component to its function in the arc?
A
sensory neurons transmit messages away from the central nervous system
B
sensory receptors detect a change in a specific condition of the body
C
synapses transfer information from efferent(leaving CNS) to afferent neurones(towards CNS) in
the central nervous system (sorry about this one!! Too hard for you guys!)
D
organs described as effectors signal information about changing body conditions to the brain.
11.
Animals that regulate their body temperature by metabolism and by precise regulation of heat
exchange with their environment include:
A
reptiles
B
mammals
C
amphibians
D
insects
12.
Which of the strategies for coping with hot environments is limited in desert dwelling animals
because of water shortages?
A
burrowing
B
panting
C
large ears with a rich network of blood vessels
D
low basal metabolic rate
13.
Homeostasis can be best defined as the maintenance of relatively stable condition in the
___________
A
blood plasma
B
intracellular fluid
C
extracellular fluid
D
extracellular environment
14.
A gland which has no duct, but which is supplied with blood vessels, would probably secrete:
A
a hormone
B
sweat
C
an enzyme
D
nitrogenous waste
15.
A student accidentally places her hand on a tack and quickly pulls her hand away. The prick of
the tack represents:
A
a stimulus
B
an impulse
C
a response
D
an effector
16.
A particular hormone will act on:
A
Only the cells in the gland that produced it
B
All cells of the body
C
Only red or white blood cells, since hormones are transported in the blood
D
Only on cells that have specific receptors for that hormone.
17
When a variable under homeostatic control falls just below its normal range, the most likely
outcome is:
A
positive feedback to fix the problem.
B
negative feedback to fix the problem
C
death via homeostasis failure.
D
stability at the new, lower value.
18.
Positive feedback can be best described as a response that :
A
reverses the original stimulates
B
exaggerates the original stimulus.
C
brings a variable back to within tolerance limits
D
has a slower rate of change over time
19.
Put these parts of a reflex arc in order:
1. transmission of message
2. effector
3. receptor
4. stimulus
5. response.
A
4-3-1-2-5
B
5-2-1-3-4
C
4-2-1-3-5
D
3-1-4-5-2
20.
Which of the following lists includes only items that are regulated by negative feedback control?
A
labour, an action potential, blood glucose concentration
B
temperature, lactation, blood glucose concentration
C
blood glucose concentration, temperature and blood osmolarity
D
blood osmolarity, blood glucose and labour
21.
Terrestrial mammals can regulate the amount of water lost in:
A
expired air
B
faeces
C
urine
D
sweat
22.
A particular vascular plant can control the amount of water loss it loses:
A
In photosynthesis
B
In respiration
C
Via transpiration
D
By evaporation across the cuticle
23.
Which of the following leaf features would you expect to observe in a plant from a tropical
forest?
A
a covering of fine hairs
B
stomata located in sunken pits
C
a very small surface area to volume ratio
D
a very thin cuticle
24.
Which is the correct pathway for the elimination of urine
A
urethra, ureter, bladder, kidney
B
kidneys, urethra, bladder, ureter
C
bladder, ureters, kidney, urethra
D
kidneys, ureters, bladder, urethra
25.
In which form are most nitrogenous wastes excreted in humans?
A
ammonia
B
uric acid
C
urea
D
amino acids
26.
Nitrogenous wastes are the result of metabolism involving:
A
lipids
B
carbohydrates
C
inorganic compounds
D
proteins
27.
In addition to water, the principal components of urine are:
A
amino acids & fatty acids
B
urea & salts
C
hydrochloric acid & urea
D
ammonia & bile
28.
Which of the following substances are completely reabsorbed in the proximal convoluted tubule of
a healthy kidney nephron.
A
sodium chloride and chloride
B
Water and glucose
C
Glucose and amino acids
D
Urea and uric acid
Use the diagram below to answer questions
7
8
29.
The structural unit shown in the diagram is called:
A
an alveolus
B
a nephron
C
a sweat gland
D
a ureter
30.
Into which structure does the filtrate first pass?
A
1
B
2
C
3
D
5
31.
In which areas are some of the substances needed by the body reabsorbed
A
2 and 3
B
3 and 7
C
4 and 2
D
5 and 7
32.
In which area is urine collected?
A
2
B
3
C
4
D
5
33.
Which of the following does not normally enter structure 3?
A
red blood cells
B
urea
C
water
D
glucose
34.
A
In a desert dweller the structure labelled 8 when compared to the same structure in
human would be
About the same length
B
Much longer
C
Much shorter
D
absent
SECTION C: Match to entries in column X with the most appropriate entry in column Y.
1)
Column X
Column Y
A
myelin sheath
1
fluid which bath the cells in a multicellular organism H Tissue Fluid
B
neurotransmitter
2
a chemical messenger E Hormone
C
effector
3
The nervous system that comprises the brain and spinal cord. I CNS
D
synapse
4
fatty substance that surrounds parts of some axons an enable a rapid rate
of neural transmission A myelin Sheath
E
hormone
5
The junction between two neurons. The two neurons do not actually touch
each other at this point. D Synapse
F
nerve-muscle
junction
6
non myelinated portions of a myelinated axon G Node of Ranvier
G
node of Ranvier
7
a muscle or gland that responds to a stimulus C effector
H
tissue fluid
8
point at which the action potential is transmitted from neuron to muscle cell
G nerve muscle junction
I
CNS
9
a chemical that diffuses across a synaptic gap and binds with a receptor on
the postsynaptic neuron B neurotransmitter
2)
Column X
Column Y
A
geotropism
1
Plant hormone that regulates reproduction in shoots, roots, and fruits F Cytokinin
B
Auxin
2
A directional growth response of a plant to an environmental stimulus
I Tropism
C
Gibberellins
3
Influence exerted by the a terminal/apical bud that suppresses growth of lateral
buds G apical dominance
D
Abscisic acid
4
movement in response to gravity A geotropism
E
Ethylene
5
Group of plants hormones that regulate growth and development. In particular
stimulates seed germination and is responsible for stem elongation. C Gibberellins
F
cytokinins
6
A gaseous plant hormone that regulates the ripening of fruit. E. Ethylene
G
Apical dominance
7
Plant response in which direction of movement is independent of direction of
stimulus causing the movement H Nastic Movement
H
Nastic movement
8
Group of plant hormones that cause cell elongation. Controls growth
responses to light, gravity, touch and others. B. Auxin
I
Tropism
9
A group of plant hormones that inhibit growth and stimulate stomatal closure in
times of water stress D abscisic acid
SECTION D SHORT ANSWER RESPONSES
1.
2.
a
i Ectothermic
3) APOLOGIES PLEASE NOTE THAT PART a) IS ONE QUESTION AND PARTS B-D ARE A DIFFERENT
QUESTION. THESE ARE NOT RELATED TO EACH OTHER. I SHOULD HAVE NUMBERED THEM
SEPARATELY
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
4)
A) NOTE THAT HOMEOTHERM IS THE BETTER RESPONSE HERE
Question 5
QUESTION 6