BIO 308 EXAM 3 QUESTIONS WITH 100% CORRECT
ANSWERS
\.If elevated, how would you decrease GFR?
a. constrict the afferent arteriole.
b. constrict the efferent arteriole.
c. dilate the afferent arteriole.
d. dilate the renal artery. - ANSWERS✔-Constrict the afferent arteriole
\.Whenever the plasma glucose concentration exceeds the Transport Maximum,
a. the GFR increases.
b. the urine volume decreases.
c. ADH is inhibited.
d. glucose will be secreted into the peritubular capillaries.
e. excess glucose will not be reabsorbed and appear in the urine. - ANSWERS✔-
Excess glucose will not be reabsorbed and appear in the urine
\.What is the countercurrent mechanism/countercurrent multiplier?
a. it is method to move sodium around so it's concentration can be controlled in
the plasma.
b. it creates an osmotic gradient in the fluid outside the loop of henle so that
urine can be concentrated at the collecting duct.
,c. it keeps the medullary interstitium hypotonic to plasma.
d. it allows the renal tubule to become hypertonic in the ascending loop of Henle.
- ANSWERS✔-It creates an osmotic gradient in the fluid outside the loop of henle
so that urine can be concentrated at the collecting duct
\.Which of the following would NOT be found in the glomerular filtrate?
a. glucose.
b. plasma proteins (albumin).
c. water.
d. Na+
e. amino acids. - ANSWERS✔-Plasma protein (albumin)
\.Which of the following is TRUE about renin?
a. it is released from the granular (juxtaglomerular cells).
b. it is secreted from the macula densa cells.
c. it is triggered in response to a drop in blood pressure.
d. it is triggered in response to an increase in blood pressure.
e. both choice a. and c. - ANSWERS✔-Both Choice A and C
\.Which of the following is (are) a direct stimulus for aldosterone?
a. high blood pressure.
b. Elevated plasma Na+ levels.
c. Increased heart rate
d. Angiotensin II.
, e. All of the above - ANSWERS✔-Angiotensin II
\.Autoregulation of GFR is regulated by:
a. macula densa cells in the juxtaglumerular apparatus sensing changes in filtrate
flow.
b. cells in the efferent arteriole.
c. the countercurrent mechanism.
d. afferent arteriole sensing changes in Na+ and Cl-.
e. the descending limb sensing changes in filtrate flow. - ANSWERS✔-Macula
dense cells in the Juxtaglumerular apparatus sensing changes in filtrate flow
\.Which of part (s) of the nephron does aldosterone effect?
a. Proximal Convoluted Tubule.
b. Descending Loop of Henle.
c. Ascending Loop of Henle
d. Distil Convoluted Tubule
e. None of the above - ANSWERS✔-Distill Convoluted Tubule
\.What part of the nephron is 100% amino acids reabsorbed?
a. Proximal Convoluted Tubule.
b. Distal Convoluted Tubule.
c. Ascending Limb of the Loop of Henle
d. Collecting Duct.
ANSWERS
\.If elevated, how would you decrease GFR?
a. constrict the afferent arteriole.
b. constrict the efferent arteriole.
c. dilate the afferent arteriole.
d. dilate the renal artery. - ANSWERS✔-Constrict the afferent arteriole
\.Whenever the plasma glucose concentration exceeds the Transport Maximum,
a. the GFR increases.
b. the urine volume decreases.
c. ADH is inhibited.
d. glucose will be secreted into the peritubular capillaries.
e. excess glucose will not be reabsorbed and appear in the urine. - ANSWERS✔-
Excess glucose will not be reabsorbed and appear in the urine
\.What is the countercurrent mechanism/countercurrent multiplier?
a. it is method to move sodium around so it's concentration can be controlled in
the plasma.
b. it creates an osmotic gradient in the fluid outside the loop of henle so that
urine can be concentrated at the collecting duct.
,c. it keeps the medullary interstitium hypotonic to plasma.
d. it allows the renal tubule to become hypertonic in the ascending loop of Henle.
- ANSWERS✔-It creates an osmotic gradient in the fluid outside the loop of henle
so that urine can be concentrated at the collecting duct
\.Which of the following would NOT be found in the glomerular filtrate?
a. glucose.
b. plasma proteins (albumin).
c. water.
d. Na+
e. amino acids. - ANSWERS✔-Plasma protein (albumin)
\.Which of the following is TRUE about renin?
a. it is released from the granular (juxtaglomerular cells).
b. it is secreted from the macula densa cells.
c. it is triggered in response to a drop in blood pressure.
d. it is triggered in response to an increase in blood pressure.
e. both choice a. and c. - ANSWERS✔-Both Choice A and C
\.Which of the following is (are) a direct stimulus for aldosterone?
a. high blood pressure.
b. Elevated plasma Na+ levels.
c. Increased heart rate
d. Angiotensin II.
, e. All of the above - ANSWERS✔-Angiotensin II
\.Autoregulation of GFR is regulated by:
a. macula densa cells in the juxtaglumerular apparatus sensing changes in filtrate
flow.
b. cells in the efferent arteriole.
c. the countercurrent mechanism.
d. afferent arteriole sensing changes in Na+ and Cl-.
e. the descending limb sensing changes in filtrate flow. - ANSWERS✔-Macula
dense cells in the Juxtaglumerular apparatus sensing changes in filtrate flow
\.Which of part (s) of the nephron does aldosterone effect?
a. Proximal Convoluted Tubule.
b. Descending Loop of Henle.
c. Ascending Loop of Henle
d. Distil Convoluted Tubule
e. None of the above - ANSWERS✔-Distill Convoluted Tubule
\.What part of the nephron is 100% amino acids reabsorbed?
a. Proximal Convoluted Tubule.
b. Distal Convoluted Tubule.
c. Ascending Limb of the Loop of Henle
d. Collecting Duct.
