BIOS 251 Week 7 Quiz Exam 2 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary site of glucose reabsorption in the
nephron?
A. Distal convoluted tubule
B. Loop of Henle
C. Proximal convoluted tubule
D. Collecting duct
Correct answer: C
Rationale: The proximal convoluted tubule reabsorbs nearly all
filtered glucose through active transport.
2. Which hormone increases water permeability in the collecting
ducts?
A. Aldosterone
B. ADH
,C. ANP
D. Renin
Correct answer: B
Rationale: ADH inserts aquaporins into collecting duct cells,
enhancing water reabsorption.
3. Which structure surrounds the glomerulus and collects filtrate?
A. Bowman's capsule
B. Proximal tubule
C. Loop of Henle
D. Distal tubule
Correct answer: A
Rationale: Bowman’s capsule encases glomerular capillaries and
channels filtrate into the nephron.
4. Which nephron segment is impermeable to water?
A. Descending Loop of Henle
B. Ascending Loop of Henle
C. Proximal tubule
D. Collecting duct
Correct answer: B
Rationale: The ascending limb actively transports ions but does not
allow water to pass.
,5. 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.
6. Which hormone is released by atrial cells in response to high
blood volume?
A. ADH
B. ANP
C. Aldosterone
D. Renin
Correct answer: B
Rationale: ANP promotes natriuresis and water excretion, lowering
blood volume.
7. Which hormone stimulates renin release from the kidney?
A. Low sodium
B. Low blood pressure
, C. Sympathetic activation
D. All of the above
Correct answer: D
Rationale: Renin secretion responds to low sodium, low BP, and
sympathetic nervous system activity.
8. Which nephron segment reabsorbs most sodium?
A. Distal tubule
B. Loop of Henle
C. Proximal tubule
D. Collecting duct
Correct answer: C
Rationale: Proximal tubule reabsorbs ~65% of filtered sodium.
9. Which nephron structure is responsible for countercurrent
multiplication?
A. Proximal tubule
B. Loop of Henle
C. Distal tubule
D. Collecting duct
Correct answer: B
Rationale: Loop of Henle establishes a medullary osmotic gradient,
enabling water reabsorption.
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. What is the primary site of glucose reabsorption in the
nephron?
A. Distal convoluted tubule
B. Loop of Henle
C. Proximal convoluted tubule
D. Collecting duct
Correct answer: C
Rationale: The proximal convoluted tubule reabsorbs nearly all
filtered glucose through active transport.
2. Which hormone increases water permeability in the collecting
ducts?
A. Aldosterone
B. ADH
,C. ANP
D. Renin
Correct answer: B
Rationale: ADH inserts aquaporins into collecting duct cells,
enhancing water reabsorption.
3. Which structure surrounds the glomerulus and collects filtrate?
A. Bowman's capsule
B. Proximal tubule
C. Loop of Henle
D. Distal tubule
Correct answer: A
Rationale: Bowman’s capsule encases glomerular capillaries and
channels filtrate into the nephron.
4. Which nephron segment is impermeable to water?
A. Descending Loop of Henle
B. Ascending Loop of Henle
C. Proximal tubule
D. Collecting duct
Correct answer: B
Rationale: The ascending limb actively transports ions but does not
allow water to pass.
,5. 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.
6. Which hormone is released by atrial cells in response to high
blood volume?
A. ADH
B. ANP
C. Aldosterone
D. Renin
Correct answer: B
Rationale: ANP promotes natriuresis and water excretion, lowering
blood volume.
7. Which hormone stimulates renin release from the kidney?
A. Low sodium
B. Low blood pressure
, C. Sympathetic activation
D. All of the above
Correct answer: D
Rationale: Renin secretion responds to low sodium, low BP, and
sympathetic nervous system activity.
8. Which nephron segment reabsorbs most sodium?
A. Distal tubule
B. Loop of Henle
C. Proximal tubule
D. Collecting duct
Correct answer: C
Rationale: Proximal tubule reabsorbs ~65% of filtered sodium.
9. Which nephron structure is responsible for countercurrent
multiplication?
A. Proximal tubule
B. Loop of Henle
C. Distal tubule
D. Collecting duct
Correct answer: B
Rationale: Loop of Henle establishes a medullary osmotic gradient,
enabling water reabsorption.
