Biology 12 Chapter 15 Homeostasis - 24

Biology 12 Chapter 15 Homeostasis - 24

1. The walls of the …………..are made more or less permeable to water, depending on need to conserve?

a) Urethra.
b) Ureter.
c) Collecting duct.
d) Fibrous capsule.

2. Which of the following will cause a decrease in ADH production?

a) Drinking water.
b) An increase in osmotic pressure of blood.
c) Dehydration.
d) Abnormally low blood pressure.

3. The function of glomerulus of the nephron is to do what?

a) Reabsorb water into blood.
b) Filter the blood and capture the filtrate.
c) Reabsorb salts and amino acids.
d) Eliminate ammonia from the body.

4. The function of Bowmans capsule of the nephron is to……..?

a) Reabsorb water into blood.
b) Filter the blood and capture the filtrate.
c) Eliminate ammonia from the body.
d) Reabsorb salts and amino acids.

5. In man, glucose is present in blood plasma but not in urine. This is because glucose molecules are…………?

a) Oxidised to supply energy for ultrafiltration.
b) Stored in kidney.
c) Actively transported from proximal tubule to capillaries.
d) Too large to enter Bowmans capsule.

6. Evidence for glomerular filtration in the kidney could be obtained by comparing the sizes of the molecules present in Bowmans capsule with those in the…………..?

a) Loop of Henle.
b) Collecting duct.
c) Afferent blood vessel.
d) Proximal tubule.

7. The site for the passage of glucose into the bloodstream in the human kidney is the…….?

a) Proximal convoluted tubule.
b) Collecting duct.
c) Glomerulus.
d) None of these.

8. The principal mechanism for the passage of glucose into the bloodstream in the human kidney is the…….?

a) Ultrafiltration.
b) Selective reabsorption.
c) None of these.
d) Active secretion.

9. A drug reduces the mitochondrial activity in kidney nephrons. Which chemical will be present in increased amounts in the urine?

a) Uric acid.
b) Urea.
c) Ammonia.
d) Glucose.

10. The main difference between endotherms and ectotherms is……………..?a) Whether they live on the land or in the water.
b) Where from they get most of their body heat.
c) How they conserve water.
d) Whether they are warm or cold blooded.

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