Fact Sheet – B3.3 Homeostasis
Name: __________
TOTAL: 62 Mark points
Question
Removal of waste & water control
1. How does water move in or out of cells? (1)
Answer
 Osmosis
 maintain a constant internal
2. Why must waste be removed from the
environment
body? (2)
 They may be toxic
Maintaining a constant internal
3. What is homeostasis? (1)
environment
 Water content
4. Name four things that must be kept within
 Ion concentration
narrow ranges in the body? (4)
 Blood glucose concentration
 temperature
1. Waste product:
 Name: Urea
 Produced by breakdown
of amino acids
 In the liver
 Excreted by the kidney in
5. Name two waste products must be removed
urine
from the body, how and where they are
2. Waste product
produced and where they are excreted? (8)
 Name: Carbon dioxide
 Produced by respiration
 In cells
 Excreted by the lungs
when we breath out
6. Where is urine stored (1)
7. What will happen if water or ion
concentration in the body is not correct? (1)
In the bladder
Water may move into or out of cells
and damage them
 Eating food
8. How do water and ions enter the body? (2)
 Drinking
9. Name 3 areas of the kidney? (3)
Cortex, medulla, pelvis
10. A healthy __________ produces _________  Kidney
by first _________ the blood then __________  Urine
all the sugar and as much ______ and
 Filtering
dissolved ______ as the body needs.
_______, excess _______ and excess
_________ are released as urine
(9)
11. Name two treatments for kidney failure?
(2)
12. A dialysis machine has the ______
______________ of useful substances as
blood?
Urea passes out of the blood into the
____________ _________(2)
9. What is done to reduce the risk of a
transplanted kidney being rejected? (1)
10. What drugs are still needed to stop a
transplanted kidney being rejected? (1)
Thermoregulation
11. Where, in the body is blood temperature
monitored with temperature receptors and
controlled (2)
12. What other temperature receptors send
impulses to the control centre? (1)
13. Two processes that cool the body down?
(2)
14. If the core body temperature is too high,
what happens to blood vessels supplying the
skin capillaries? (3)
15. If the core body temperature is too low,
what happens to blood vessels supplying the
skin capillaries? (3)
 Reabsorbing
 Water
 Ions
 Urea
 Ions
 water
 Dialysis machine
 Kidney transplant
 Same concentration
 Dialysis fluid
Matching of “tissue type”
Immunosuppressant drugs
 Thermoregulatory centre
 in the brain
Skin temperature receptors
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■ Why do muscles may ‘shiver’ ? (3)
Sweating
Vasodilation
They dilate
so that more blood flows
through the capillaries
and more heat is lost
they constrict
to reduce the flow of blood
through the capillaries
and less heat is lost
 muscle contraction
 needs respiration
 which releases some energy
to warm the body
Blood sugar control
16. Where, in the body is blood glucose
concentration monitored and controlled? (1)
In the pancreas
 pancreas produces the
17. What happens if blood glucose increases ?
hormone insulin
(2)
 which allows glucose to move
from the blood into the cells.
 A second hormone, glucagon, is
produced in the pancreas
18. What happens if blood glucose decreases?
 This causes glycogen to be
(2)
converted into glucose and be
released into the blood.
 a person’s blood glucose
concentration may rise to a
19. Describe the disease Type 1 Diabetes.
high level
(2)
 because the pancreas does
not produce enough of the
hormone insulin.
 Careful dieting
20. How is Type 1 Diabetes controlled? (3)
 Exercise
 Injecting insulin