BIOS 256 WEEK 3 QUIZ EXAM 1
(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
filtration of blood?
A. Loop of Henle
B. Glomerulus
C. Distal convoluted tubule
D. Collecting duct
Correct Answer: B
Rationale: The glomerulus filters blood, allowing water and solutes
to pass into Bowman's capsule.
2. Which part of the nephron is mainly responsible for water
reabsorption?
A. Proximal convoluted tubule
B. Glomerulus
C. Loop of Henle
D. Distal convoluted tubule
,Correct Answer: C
Rationale: The loop of Henle creates a concentration gradient that
enables water reabsorption.
3. Which hormone increases water reabsorption in the collecting
ducts?
A. Aldosterone
B. ADH
C. Renin
D. Angiotensin II
Correct Answer: B
Rationale: Antidiuretic hormone (ADH) increases permeability of
the collecting ducts to water.
4. Which hormone increases sodium reabsorption in the distal
tubules?
A. ADH
B. Aldosterone
C. Renin
D. ANP
Correct Answer: B
Rationale: Aldosterone promotes sodium retention and potassium
excretion in distal nephron segments.
5. What is the functional unit of the kidney?
,A. Nephron
B. Glomerulus
C. Bowman’s capsule
D. Collecting duct
Correct Answer: A
Rationale: The nephron filters blood and forms urine.
6. Which part of the nephron reabsorbs most of the glucose?
A. Proximal convoluted tubule
B. Loop of Henle
C. Distal convoluted tubule
D. Collecting duct
Correct Answer: A
Rationale: The proximal tubule reabsorbs nearly all filtered glucose
via active transport.
7. What is the main function of the loop of Henle?
A. Secretion of ions
B. Concentration of urine
C. Filtration
D. Hormone production
Correct Answer: B
Rationale: The loop of Henle establishes a countercurrent gradient
to concentrate urine.
, 8. Which process removes urea and creatinine from the blood?
A. Reabsorption
B. Filtration
C. Secretion
D. Excretion
Correct Answer: B
Rationale: Filtration in the glomerulus removes waste products into
the nephron.
9. Which structure collects urine from several nephrons?
A. Proximal tubule
B. Loop of Henle
C. Collecting duct
D. Glomerulus
Correct Answer: C
Rationale: Collecting ducts receive filtrate from multiple nephrons
and transport urine to the renal pelvis.
10. Which enzyme converts angiotensinogen to angiotensin I?
A. ACE
B. Renin
C. ADH
D. Aldosterone
(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
filtration of blood?
A. Loop of Henle
B. Glomerulus
C. Distal convoluted tubule
D. Collecting duct
Correct Answer: B
Rationale: The glomerulus filters blood, allowing water and solutes
to pass into Bowman's capsule.
2. Which part of the nephron is mainly responsible for water
reabsorption?
A. Proximal convoluted tubule
B. Glomerulus
C. Loop of Henle
D. Distal convoluted tubule
,Correct Answer: C
Rationale: The loop of Henle creates a concentration gradient that
enables water reabsorption.
3. Which hormone increases water reabsorption in the collecting
ducts?
A. Aldosterone
B. ADH
C. Renin
D. Angiotensin II
Correct Answer: B
Rationale: Antidiuretic hormone (ADH) increases permeability of
the collecting ducts to water.
4. Which hormone increases sodium reabsorption in the distal
tubules?
A. ADH
B. Aldosterone
C. Renin
D. ANP
Correct Answer: B
Rationale: Aldosterone promotes sodium retention and potassium
excretion in distal nephron segments.
5. What is the functional unit of the kidney?
,A. Nephron
B. Glomerulus
C. Bowman’s capsule
D. Collecting duct
Correct Answer: A
Rationale: The nephron filters blood and forms urine.
6. Which part of the nephron reabsorbs most of the glucose?
A. Proximal convoluted tubule
B. Loop of Henle
C. Distal convoluted tubule
D. Collecting duct
Correct Answer: A
Rationale: The proximal tubule reabsorbs nearly all filtered glucose
via active transport.
7. What is the main function of the loop of Henle?
A. Secretion of ions
B. Concentration of urine
C. Filtration
D. Hormone production
Correct Answer: B
Rationale: The loop of Henle establishes a countercurrent gradient
to concentrate urine.
, 8. Which process removes urea and creatinine from the blood?
A. Reabsorption
B. Filtration
C. Secretion
D. Excretion
Correct Answer: B
Rationale: Filtration in the glomerulus removes waste products into
the nephron.
9. Which structure collects urine from several nephrons?
A. Proximal tubule
B. Loop of Henle
C. Collecting duct
D. Glomerulus
Correct Answer: C
Rationale: Collecting ducts receive filtrate from multiple nephrons
and transport urine to the renal pelvis.
10. Which enzyme converts angiotensinogen to angiotensin I?
A. ACE
B. Renin
C. ADH
D. Aldosterone
