BIOS 256 Week 7 Quiz Final Exam
(Latest Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. Which hormone regulates calcium homeostasis by increasing
blood calcium?
A. Calcitonin
B. Parathyroid hormone (PTH)
C. Aldosterone
D. ADH
Correct Answer: B
Rationale: PTH increases calcium by stimulating bone resorption
and kidney reabsorption.
2. Which hormone lowers blood calcium levels?
A. PTH
B. Calcitonin
C. Vitamin D
D. Aldosterone
Correct Answer: B
,Rationale: Calcitonin inhibits bone resorption, decreasing blood
calcium.
3. Which vitamin is converted by kidneys to active form for
calcium absorption?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
Correct Answer: C
Rationale: Kidneys convert vitamin D to calcitriol to enhance
intestinal calcium absorption.
4. Which cells secrete PTH?
A. Thyroid follicular cells
B. Parathyroid chief cells
C. Adrenal medulla cells
D. Beta cells of pancreas
Correct Answer: B
Rationale: Chief cells of parathyroid glands release PTH in
response to low calcium.
5. Which cells secrete calcitonin?
A. Parafollicular (C) cells of thyroid
B. Chief cells of parathyroid
,C. Beta cells of pancreas
D. Adrenal cortex cells
Correct Answer: A
Rationale: C cells of thyroid release calcitonin to reduce blood
calcium.
6. What is the functional unit of the kidney?
A. Glomerulus
B. Nephron
C. Bowman's capsule
D. Loop of Henle
Correct Answer: B
Rationale: The nephron performs filtration, reabsorption, secretion,
and excretion.
7. Which nephron part filters blood?
A. Proximal tubule
B. Glomerulus
C. Distal tubule
D. Collecting duct
Correct Answer: B
Rationale: Glomerulus filters plasma to form filtrate.
8. Which structure collects filtrate from glomerulus?
, A. Bowman's capsule
B. Loop of Henle
C. Distal tubule
D. Collecting duct
Correct Answer: A
Rationale: Bowman's capsule surrounds glomerulus and collects
filtrate.
9. Which process moves water and solutes from blood into
nephron?
A. Filtration
B. Reabsorption
C. Secretion
D. Excretion
Correct Answer: A
Rationale: Filtration is driven by hydrostatic pressure in glomerular
capillaries.
10. Which process returns water and solutes from nephron to
blood?
A. Filtration
B. Reabsorption
C. Secretion
D. Excretion
Correct Answer: B
(Latest Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. Which hormone regulates calcium homeostasis by increasing
blood calcium?
A. Calcitonin
B. Parathyroid hormone (PTH)
C. Aldosterone
D. ADH
Correct Answer: B
Rationale: PTH increases calcium by stimulating bone resorption
and kidney reabsorption.
2. Which hormone lowers blood calcium levels?
A. PTH
B. Calcitonin
C. Vitamin D
D. Aldosterone
Correct Answer: B
,Rationale: Calcitonin inhibits bone resorption, decreasing blood
calcium.
3. Which vitamin is converted by kidneys to active form for
calcium absorption?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
Correct Answer: C
Rationale: Kidneys convert vitamin D to calcitriol to enhance
intestinal calcium absorption.
4. Which cells secrete PTH?
A. Thyroid follicular cells
B. Parathyroid chief cells
C. Adrenal medulla cells
D. Beta cells of pancreas
Correct Answer: B
Rationale: Chief cells of parathyroid glands release PTH in
response to low calcium.
5. Which cells secrete calcitonin?
A. Parafollicular (C) cells of thyroid
B. Chief cells of parathyroid
,C. Beta cells of pancreas
D. Adrenal cortex cells
Correct Answer: A
Rationale: C cells of thyroid release calcitonin to reduce blood
calcium.
6. What is the functional unit of the kidney?
A. Glomerulus
B. Nephron
C. Bowman's capsule
D. Loop of Henle
Correct Answer: B
Rationale: The nephron performs filtration, reabsorption, secretion,
and excretion.
7. Which nephron part filters blood?
A. Proximal tubule
B. Glomerulus
C. Distal tubule
D. Collecting duct
Correct Answer: B
Rationale: Glomerulus filters plasma to form filtrate.
8. Which structure collects filtrate from glomerulus?
, A. Bowman's capsule
B. Loop of Henle
C. Distal tubule
D. Collecting duct
Correct Answer: A
Rationale: Bowman's capsule surrounds glomerulus and collects
filtrate.
9. Which process moves water and solutes from blood into
nephron?
A. Filtration
B. Reabsorption
C. Secretion
D. Excretion
Correct Answer: A
Rationale: Filtration is driven by hydrostatic pressure in glomerular
capillaries.
10. Which process returns water and solutes from nephron to
blood?
A. Filtration
B. Reabsorption
C. Secretion
D. Excretion
Correct Answer: B
