SBI4U1
ABBEY PARK
DATE: ________________ NAME: _________________
Chapter 7 Homeostasis Quiz
Modified True/False: Indicate whether the sentence or statement is true or false. If false, change the identified word or
phrase to make the sentence or statement true.
____
1. Contractions that increase in strength during pregnancy are an example of a negative feedback mechanism.
______________________________
____
2. Some animals sun themselves or retreat to shade as a way of regulating their body temperature.
______________________________
____
3. An increase in body temperature is detected by sensors in the brain. The brain sends a nerve message to the
hypothalamus. ______________________________
____
4. Kidneys remove waste, balance blood pH, and maintain water balance. _________________________
____
5. Wastes are filtered from the blood by the kidneys and conducted to the urinary bladder by the urethra.
_________________________
____
6. A cross section of the kidney shows an outer layer called the medulla, an inner layer called the cortex, and a
hollow chamber called the renal pelvis.
____________________________________________________________
____
7. Plasma proteins, erythrocytes, and platelets are transferred to the Bowman's capsule.
________________________________________
____
8. When a person sweats and does not drink water, the pituitary gland releases ADH.
______________________________
____
9. The kidney combines carbon dioxide and water to create bicarbonate ions that are released into the blood, and
hydrogen ions combine with either phosphate ions or ammonia and are excreted with the filtrate from the
medulla. _________________________
____ 10. Adrenal cortex releases the hormone aldosterone that increases water reabsorption.
______________________________
Completion: Complete each sentence or statement.
11. As the environment changes, our bodies use the nervous and endocrine systems to compensate by a
mechanism called ___________________.
12. Temperature fluctuations are controlled by the ____________________.
13. If a person has lost a lot of water, the kidneys will produce a more ____________________ urine.
14. ____________________ involves the transfer of essential solutes and water from the nephron back into the
blood.
15. Changes in osmotic pressure of the blood are determined by ____________________ in the hypothalamus.
16. Blood vessel constriction and the release of aldosterone are controlled by the activated enzyme
____________________.
MatchingMatch each item with the correct statement below.
a. ectotherm
d. deamination
b. positive feedback
e. glomerulus
c. reabsorption
\
____
____
____
____
____
17.
18.
19.
20.
21.
nutrients move from renal tubules to blood vessels
increases in intensity of response to stimulus
removal of amino group from amino acid
depend on air temperature to regulate body
capillary bed which filters the blood
Short Answer – STAPLE EXTRA SHEETS TOGETHER
22. Why may a larger volume of fluid move across the glomerular membrane than across the membrane of other body
capillaries?
(2 MARKS)
23.Why is it important that the Loop of Henle passes into the medulla of the kidney?
(2 MARKS)
24.You are playing an active game and you begin to sweat. Soon you feel cooler.
(4 MARKS)
For the above homeostatic system, construct a labelled diagram to represent the feedback loop involved. On
the diagram, indicate the receptor(s), the control centre(s), and the effector(s).
25.Draw a flowchart that illustrates the path of a molecule of urea from its entry into the renal artery to the collecting
ducts.(3 MARKS)
26.Complete the following table, comparing the concentrations of the listed materials in three locations in the excretion of
urine by the kidneys of a healthy person. Use the symbols, H = high, M = medium, and L = low for the concentrations.
(6 MARKS)
Materials
Urine
Blood of the Afferent
Bowman's Capsule
Arteriole
Filtrate
blood protein
glucose
sodium ions
urea
Chapter 7 Homeostasis Quiz 1
Answer Section
MODIFIED TRUE/FALSE
1. F, positive feedback mechanisms 2.
T
3.
T
4.
T
5. F, ureter
6.
F, outer layer called the cortex, an inner layer called the medulla
7. F, not transferred to the Bowman's capsule
8.
T
9.
F, nephron
10.
T
COMPLETION
11. homeostasis
12.
hypothalamus 13.
concentrated
14.
15. osmoreceptors
16.
angiotensin
MATCHING
17. C, 18. B, 19. D, 20. A , 21. E
SHORT ANSWER
22. ANS: more permeable AND more hydrostatic pressure
23. ANS: need to establish a salt/ion gradient AND water will follow by osmosis
Reabsorption
24. ANS:
25. ANS:
Renal
Artery--------->
Proximal
Tubule-------->
26. ANS:
Materials
Afferent
Arteriole---------->
Loop of
Henle--------->
Glomerulus-------->
Distal
Tubules--------->
Bowman's Capsule
Collecting
Ducts
Blood of the Afferent
Arteriole
Bowman's Capsule
Filtrate
Urine
blood protein
H
L
L
glucose
M
M
L
sodium ions
M
M
L
urea
L
L
H