BIOS 252 Week 3 Quiz Exam 4 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The main function of the nephron is:
A. Hormone secretion
B. Filtration, reabsorption, and secretion
C. Blood oxygenation
D. Urine storage
Correct answer: B
Rationale: Nephron filters blood, reabsorbs essential substances,
and secretes wastes.
2. The glomerulus is:
A. A capillary tuft for filtration
B. A tubular structure
C. Part of the ureter
D. Collecting duct
Correct answer: A
,Rationale: Blood enters glomerulus under pressure, allowing
plasma filtration.
3. Bowman's capsule surrounds:
A. Loop of Henle
B. Collecting duct
C. Glomerulus
D. DCT
Correct answer: C
Rationale: Collects filtrate from glomerular capillaries.
4. The proximal tubule primarily reabsorbs:
A. Water, glucose, ions, amino acids
B. Only water
C. Only Na⁺
D. Only glucose
Correct answer: A
Rationale: ~65–70% of filtered water and solutes are reabsorbed
here.
5. Loop of Henle function is to:
A. Concentrate filtrate
B. Dilute filtrate
C. Store urine
,D. Secrete hormones
Correct answer: A
Rationale: Creates a medullary osmotic gradient for water
reabsorption.
6. Distal convoluted tubule function:
A. Hormonal regulation of Na⁺ and water
B. Filtration only
C. Urine storage
D. Glucose reabsorption
Correct answer: A
Rationale: Aldosterone regulates Na⁺ reabsorption here.
7. Collecting duct permeability is regulated by:
A. ADH
B. Aldosterone
C. Both A and B
D. None
Correct answer: C
Rationale: ADH controls water; aldosterone controls Na⁺.
8. ADH promotes:
A. Water reabsorption
B. Na⁺ excretion
, C. Urine volume increase
D. Urea secretion
Correct answer: A
Rationale: ADH inserts aquaporins into collecting duct membranes.
9. Aldosterone acts on:
A. Proximal tubule
B. DCT and collecting duct
C. Loop of Henle
D. Glomerulus
Correct answer: B
Rationale: Increases Na⁺ reabsorption and K⁺ secretion.
10. The juxtaglomerular apparatus (JGA) senses:
A. Blood pressure and Na⁺ levels
B. Glucose concentration
C. CO₂
D. O₂
Correct answer: A
Rationale: Regulates renin release to control blood pressure.
11. Renin converts:
A. Angiotensinogen → Angiotensin I
B. Angiotensin I → Angiotensin II
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The main function of the nephron is:
A. Hormone secretion
B. Filtration, reabsorption, and secretion
C. Blood oxygenation
D. Urine storage
Correct answer: B
Rationale: Nephron filters blood, reabsorbs essential substances,
and secretes wastes.
2. The glomerulus is:
A. A capillary tuft for filtration
B. A tubular structure
C. Part of the ureter
D. Collecting duct
Correct answer: A
,Rationale: Blood enters glomerulus under pressure, allowing
plasma filtration.
3. Bowman's capsule surrounds:
A. Loop of Henle
B. Collecting duct
C. Glomerulus
D. DCT
Correct answer: C
Rationale: Collects filtrate from glomerular capillaries.
4. The proximal tubule primarily reabsorbs:
A. Water, glucose, ions, amino acids
B. Only water
C. Only Na⁺
D. Only glucose
Correct answer: A
Rationale: ~65–70% of filtered water and solutes are reabsorbed
here.
5. Loop of Henle function is to:
A. Concentrate filtrate
B. Dilute filtrate
C. Store urine
,D. Secrete hormones
Correct answer: A
Rationale: Creates a medullary osmotic gradient for water
reabsorption.
6. Distal convoluted tubule function:
A. Hormonal regulation of Na⁺ and water
B. Filtration only
C. Urine storage
D. Glucose reabsorption
Correct answer: A
Rationale: Aldosterone regulates Na⁺ reabsorption here.
7. Collecting duct permeability is regulated by:
A. ADH
B. Aldosterone
C. Both A and B
D. None
Correct answer: C
Rationale: ADH controls water; aldosterone controls Na⁺.
8. ADH promotes:
A. Water reabsorption
B. Na⁺ excretion
, C. Urine volume increase
D. Urea secretion
Correct answer: A
Rationale: ADH inserts aquaporins into collecting duct membranes.
9. Aldosterone acts on:
A. Proximal tubule
B. DCT and collecting duct
C. Loop of Henle
D. Glomerulus
Correct answer: B
Rationale: Increases Na⁺ reabsorption and K⁺ secretion.
10. The juxtaglomerular apparatus (JGA) senses:
A. Blood pressure and Na⁺ levels
B. Glucose concentration
C. CO₂
D. O₂
Correct answer: A
Rationale: Regulates renin release to control blood pressure.
11. Renin converts:
A. Angiotensinogen → Angiotensin I
B. Angiotensin I → Angiotensin II
