BIOS 252 Lab Practical Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which organ filters blood to form urine?
A. Kidney
B. Liver
C. Heart
D. Spleen
Correct Answer: A
Rationale: Kidneys remove waste products and excess
substances from blood to produce urine.
2. Which part of the nephron reabsorbs most water?
A. Proximal convoluted tubule
B. Distal convoluted tubule
C. Loop of Henle
D. Collecting duct
,Correct Answer: A
Rationale: The proximal tubule reabsorbs around 65–70%
of filtrate water.
3. Which part of the nephron concentrates urine?
A. Loop of Henle
B. Proximal convoluted tubule
C. Distal convoluted tubule
D. Bowman's capsule
Correct Answer: A
Rationale: The loop of Henle creates a concentration
gradient to reabsorb water.
4. Which part of nephron is responsible for filtration?
A. Bowman's capsule
B. Loop of Henle
C. Proximal tubule
D. Distal tubule
Correct Answer: A
Rationale: Bowman's capsule surrounds glomerulus and
filters plasma from blood.
,5. Which hormone increases water reabsorption in
kidneys?
A. ADH (Antidiuretic hormone)
B. Aldosterone
C. Cortisol
D. Insulin
Correct Answer: A
Rationale: ADH acts on collecting ducts to increase water
permeability.
6. Which hormone increases sodium reabsorption?
A. Aldosterone
B. ADH
C. Cortisol
D. Glucagon
Correct Answer: A
Rationale: Aldosterone acts on distal tubules and collecting
ducts.
7. Which organ secretes renin?
A. Kidney
B. Liver
, C. Pancreas
D. Heart
Correct Answer: A
Rationale: Juxtaglomerular cells of the kidney secrete renin
to regulate blood pressure.
8. Which enzyme converts angiotensin I to angiotensin II?
A. ACE (Angiotensin-converting enzyme)
B. Renin
C. Aldosterone
D. ADH
Correct Answer: A
Rationale: ACE is primarily found in pulmonary capillaries.
9. Which part of nephron is impermeable to water?
A. Ascending loop of Henle
B. Descending loop of Henle
C. Proximal tubule
D. Collecting duct
Correct Answer: A
Rationale: Ascending limb actively transports ions but is
water-impermeable.
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which organ filters blood to form urine?
A. Kidney
B. Liver
C. Heart
D. Spleen
Correct Answer: A
Rationale: Kidneys remove waste products and excess
substances from blood to produce urine.
2. Which part of the nephron reabsorbs most water?
A. Proximal convoluted tubule
B. Distal convoluted tubule
C. Loop of Henle
D. Collecting duct
,Correct Answer: A
Rationale: The proximal tubule reabsorbs around 65–70%
of filtrate water.
3. Which part of the nephron concentrates urine?
A. Loop of Henle
B. Proximal convoluted tubule
C. Distal convoluted tubule
D. Bowman's capsule
Correct Answer: A
Rationale: The loop of Henle creates a concentration
gradient to reabsorb water.
4. Which part of nephron is responsible for filtration?
A. Bowman's capsule
B. Loop of Henle
C. Proximal tubule
D. Distal tubule
Correct Answer: A
Rationale: Bowman's capsule surrounds glomerulus and
filters plasma from blood.
,5. Which hormone increases water reabsorption in
kidneys?
A. ADH (Antidiuretic hormone)
B. Aldosterone
C. Cortisol
D. Insulin
Correct Answer: A
Rationale: ADH acts on collecting ducts to increase water
permeability.
6. Which hormone increases sodium reabsorption?
A. Aldosterone
B. ADH
C. Cortisol
D. Glucagon
Correct Answer: A
Rationale: Aldosterone acts on distal tubules and collecting
ducts.
7. Which organ secretes renin?
A. Kidney
B. Liver
, C. Pancreas
D. Heart
Correct Answer: A
Rationale: Juxtaglomerular cells of the kidney secrete renin
to regulate blood pressure.
8. Which enzyme converts angiotensin I to angiotensin II?
A. ACE (Angiotensin-converting enzyme)
B. Renin
C. Aldosterone
D. ADH
Correct Answer: A
Rationale: ACE is primarily found in pulmonary capillaries.
9. Which part of nephron is impermeable to water?
A. Ascending loop of Henle
B. Descending loop of Henle
C. Proximal tubule
D. Collecting duct
Correct Answer: A
Rationale: Ascending limb actively transports ions but is
water-impermeable.
