BIOS 252 Week 4 Quiz Exam 3 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The small intestine is divided into:
A. Duodenum, jejunum, ileum
B. Duodenum, colon, cecum
C. Ileum, colon, rectum
D. Jejunum, colon, appendix
Correct answer: A
Rationale: The small intestine is the primary site of digestion and
nutrient absorption.
2. Villi in the small intestine:
A. Increase surface area for absorption
B. Secrete bile
C. Store glycogen
D. Produce hormones
Correct answer: A
,Rationale: Finger-like projections maximize absorption efficiency.
3. Microvilli form the:
A. Brush border
B. Villi
C. Lacteals
D. Peyer’s patches
Correct answer: A
Rationale: Microvilli further increase surface area for digestive
enzymes and nutrient absorption.
4. Lacteals are:
A. Lymphatic vessels for fat absorption
B. Blood vessels for glucose absorption
C. Nerve endings in mucosa
D. Enzyme secretory cells
Correct answer: A
Rationale: Transport dietary fats as chylomicrons to lymphatic
system.
5. Bile salts are synthesized from:
A. Cholesterol
B. Glucose
C. Amino acids
,D. Fatty acids
Correct answer: A
Rationale: Bile salts emulsify fats to aid lipase action.
6. The primary enzyme for carbohydrate digestion in mouth is:
A. Salivary amylase
B. Pepsin
C. Lipase
D. Trypsin
Correct answer: A
Rationale: Breaks down starch into maltose starting in oral cavity.
7. Protein digestion begins in:
A. Stomach
B. Mouth
C. Small intestine
D. Colon
Correct answer: A
Rationale: Pepsin hydrolyzes proteins into smaller peptides in acidic
environment.
8. Fat digestion requires:
A. Bile salts and pancreatic lipase
B. Amylase only
, C. Pepsin only
D. Trypsin only
Correct answer: A
Rationale: Emulsification by bile increases surface area for lipase
to act.
9. The duodenum receives secretions from:
A. Pancreas and gallbladder
B. Liver only
C. Stomach only
D. Colon only
Correct answer: A
Rationale: Pancreatic enzymes and bile aid digestion in duodenum.
10. Secretin is secreted in response to:
A. Acidic chyme entering duodenum
B. Fat in stomach
C. Protein in stomach
D. Carbohydrates in colon
Correct answer: A
Rationale: Stimulates pancreatic bicarbonate to neutralize acidic
chyme.
11. Cholecystokinin (CCK) stimulates:
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The small intestine is divided into:
A. Duodenum, jejunum, ileum
B. Duodenum, colon, cecum
C. Ileum, colon, rectum
D. Jejunum, colon, appendix
Correct answer: A
Rationale: The small intestine is the primary site of digestion and
nutrient absorption.
2. Villi in the small intestine:
A. Increase surface area for absorption
B. Secrete bile
C. Store glycogen
D. Produce hormones
Correct answer: A
,Rationale: Finger-like projections maximize absorption efficiency.
3. Microvilli form the:
A. Brush border
B. Villi
C. Lacteals
D. Peyer’s patches
Correct answer: A
Rationale: Microvilli further increase surface area for digestive
enzymes and nutrient absorption.
4. Lacteals are:
A. Lymphatic vessels for fat absorption
B. Blood vessels for glucose absorption
C. Nerve endings in mucosa
D. Enzyme secretory cells
Correct answer: A
Rationale: Transport dietary fats as chylomicrons to lymphatic
system.
5. Bile salts are synthesized from:
A. Cholesterol
B. Glucose
C. Amino acids
,D. Fatty acids
Correct answer: A
Rationale: Bile salts emulsify fats to aid lipase action.
6. The primary enzyme for carbohydrate digestion in mouth is:
A. Salivary amylase
B. Pepsin
C. Lipase
D. Trypsin
Correct answer: A
Rationale: Breaks down starch into maltose starting in oral cavity.
7. Protein digestion begins in:
A. Stomach
B. Mouth
C. Small intestine
D. Colon
Correct answer: A
Rationale: Pepsin hydrolyzes proteins into smaller peptides in acidic
environment.
8. Fat digestion requires:
A. Bile salts and pancreatic lipase
B. Amylase only
, C. Pepsin only
D. Trypsin only
Correct answer: A
Rationale: Emulsification by bile increases surface area for lipase
to act.
9. The duodenum receives secretions from:
A. Pancreas and gallbladder
B. Liver only
C. Stomach only
D. Colon only
Correct answer: A
Rationale: Pancreatic enzymes and bile aid digestion in duodenum.
10. Secretin is secreted in response to:
A. Acidic chyme entering duodenum
B. Fat in stomach
C. Protein in stomach
D. Carbohydrates in colon
Correct answer: A
Rationale: Stimulates pancreatic bicarbonate to neutralize acidic
chyme.
11. Cholecystokinin (CCK) stimulates:
