BIOS 251 Week 7 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which part of the nephron is primarily responsible for
reabsorbing glucose?
A. Distal tubule
B. Proximal tubule
C. Loop of Henle
D. Collecting duct
Correct answer: B
Rationale: The proximal tubule reabsorbs nearly all filtered glucose
via active transport.
2. Which hormone increases water reabsorption in the collecting
ducts?
A. Aldosterone
B. ADH
,C. ANP
D. Renin
Correct answer: B
Rationale: ADH inserts aquaporins into the collecting duct,
enhancing water reabsorption.
3. Which nephron segment is impermeable to water?
A. Ascending Loop of Henle
B. Descending Loop of Henle
C. Proximal tubule
D. Collecting duct
Correct answer: A
Rationale: The ascending limb actively transports ions but does not
allow water movement.
4. Which hormone promotes sodium retention and potassium
excretion?
A. ADH
B. Aldosterone
C. ANP
D. Angiotensin II
Correct answer: B
Rationale: Aldosterone acts on distal tubule and collecting duct to
reabsorb sodium and secrete potassium.
,5. Which hormone decreases blood volume and pressure?
A. ADH
B. ANP
C. Aldosterone
D. Renin
Correct answer: B
Rationale: ANP promotes sodium and water excretion to lower
blood volume.
6. Which hormone stimulates renin release?
A. Low blood pressure
B. Low sodium
C. Sympathetic activation
D. All of the above
Correct answer: D
Rationale: Renin secretion is triggered by low BP, low sodium, and
sympathetic activity.
7. Which nephron segment establishes the medullary osmotic
gradient?
A. Proximal tubule
B. Loop of Henle
C. Distal tubule
D. Collecting duct
, Correct answer: B
Rationale: Countercurrent multiplication in the Loop of Henle
concentrates the medulla.
8. Which hormone is released in response to high plasma
osmolarity?
A. ADH
B. Aldosterone
C. ANP
D. Renin
Correct answer: A
Rationale: ADH conserves water to restore normal plasma
osmolarity.
9. Which hormone stimulates potassium secretion in the distal
nephron?
A. ADH
B. Aldosterone
C. ANP
D. Angiotensin II
Correct answer: B
Rationale: Aldosterone increases potassium excretion in exchange
for sodium reabsorption.
10. Which hormone indirectly increases sodium reabsorption?
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which part of the nephron is primarily responsible for
reabsorbing glucose?
A. Distal tubule
B. Proximal tubule
C. Loop of Henle
D. Collecting duct
Correct answer: B
Rationale: The proximal tubule reabsorbs nearly all filtered glucose
via active transport.
2. Which hormone increases water reabsorption in the collecting
ducts?
A. Aldosterone
B. ADH
,C. ANP
D. Renin
Correct answer: B
Rationale: ADH inserts aquaporins into the collecting duct,
enhancing water reabsorption.
3. Which nephron segment is impermeable to water?
A. Ascending Loop of Henle
B. Descending Loop of Henle
C. Proximal tubule
D. Collecting duct
Correct answer: A
Rationale: The ascending limb actively transports ions but does not
allow water movement.
4. Which hormone promotes sodium retention and potassium
excretion?
A. ADH
B. Aldosterone
C. ANP
D. Angiotensin II
Correct answer: B
Rationale: Aldosterone acts on distal tubule and collecting duct to
reabsorb sodium and secrete potassium.
,5. Which hormone decreases blood volume and pressure?
A. ADH
B. ANP
C. Aldosterone
D. Renin
Correct answer: B
Rationale: ANP promotes sodium and water excretion to lower
blood volume.
6. Which hormone stimulates renin release?
A. Low blood pressure
B. Low sodium
C. Sympathetic activation
D. All of the above
Correct answer: D
Rationale: Renin secretion is triggered by low BP, low sodium, and
sympathetic activity.
7. Which nephron segment establishes the medullary osmotic
gradient?
A. Proximal tubule
B. Loop of Henle
C. Distal tubule
D. Collecting duct
, Correct answer: B
Rationale: Countercurrent multiplication in the Loop of Henle
concentrates the medulla.
8. Which hormone is released in response to high plasma
osmolarity?
A. ADH
B. Aldosterone
C. ANP
D. Renin
Correct answer: A
Rationale: ADH conserves water to restore normal plasma
osmolarity.
9. Which hormone stimulates potassium secretion in the distal
nephron?
A. ADH
B. Aldosterone
C. ANP
D. Angiotensin II
Correct answer: B
Rationale: Aldosterone increases potassium excretion in exchange
for sodium reabsorption.
10. Which hormone indirectly increases sodium reabsorption?
