BIOS 252 Week 7 Quiz Exam 1 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The primary function of the digestive system is:
A. Circulating blood
B. Gas exchange
C. Breakdown and absorption of nutrients
D. Producing hormones
Correct Answer: C
Rationale: The digestive system processes food and absorbs
nutrients for energy and growth.
2. The first step of digestion occurs in the:
A. Stomach
B. Mouth
C. Small intestine
D. Large intestine
Correct Answer: B
Rationale: Mechanical breakdown and enzymatic digestion of
carbohydrates begin in the mouth.
,3. Saliva contains:
A. Lipase and amylase
B. Pepsin only
C. Hydrochloric acid only
D. Bile
Correct Answer: A
Rationale: Amylase digests starch; lipase begins fat digestion.
4. The esophagus transports food via:
A. Peristalsis
B. Diffusion
C. Active transport
D. Osmosis
Correct Answer: A
Rationale: Coordinated muscular contractions move food from
mouth to stomach.
5. The stomach secretes:
A. Hydrochloric acid, pepsin, mucus
B. Bile
C. Insulin only
D. Amylase only
Correct Answer: A
Rationale: Acid and enzymes break down proteins, while mucus
protects the lining.
,6. Pepsinogen is activated by:
A. Hydrochloric acid
B. Bile
C. Saliva
D. Gastrin only
Correct Answer: A
Rationale: Converts pepsinogen to pepsin for protein digestion.
7. The small intestine is the primary site for:
A. Nutrient absorption
B. Gas exchange
C. RBC production
D. Urine formation
Correct Answer: A
Rationale: Villi and microvilli increase surface area for absorption.
8. Bile is produced by the:
A. Liver
B. Gallbladder
C. Pancreas
D. Stomach
Correct Answer: A
Rationale: Bile emulsifies fats to aid digestion.
9. Bile is stored in the:
, A. Gallbladder
B. Liver
C. Pancreas
D. Duodenum
Correct Answer: A
Rationale: Releases bile into the small intestine when fats are
present.
10. The pancreas secretes:
A. Digestive enzymes and bicarbonate
B. Bile only
C. Hydrochloric acid only
D. Saliva only
Correct Answer: A
Rationale: Enzymes digest carbohydrates, proteins, and fats;
bicarbonate neutralizes stomach acid.
11. The large intestine primarily:
A. Absorbs water and electrolytes
B. Absorbs proteins
C. Secretes bile
D. Produces insulin
Correct Answer: A
Rationale: Forms and stores feces while recovering water.
12. The main structural units of the liver are:
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The primary function of the digestive system is:
A. Circulating blood
B. Gas exchange
C. Breakdown and absorption of nutrients
D. Producing hormones
Correct Answer: C
Rationale: The digestive system processes food and absorbs
nutrients for energy and growth.
2. The first step of digestion occurs in the:
A. Stomach
B. Mouth
C. Small intestine
D. Large intestine
Correct Answer: B
Rationale: Mechanical breakdown and enzymatic digestion of
carbohydrates begin in the mouth.
,3. Saliva contains:
A. Lipase and amylase
B. Pepsin only
C. Hydrochloric acid only
D. Bile
Correct Answer: A
Rationale: Amylase digests starch; lipase begins fat digestion.
4. The esophagus transports food via:
A. Peristalsis
B. Diffusion
C. Active transport
D. Osmosis
Correct Answer: A
Rationale: Coordinated muscular contractions move food from
mouth to stomach.
5. The stomach secretes:
A. Hydrochloric acid, pepsin, mucus
B. Bile
C. Insulin only
D. Amylase only
Correct Answer: A
Rationale: Acid and enzymes break down proteins, while mucus
protects the lining.
,6. Pepsinogen is activated by:
A. Hydrochloric acid
B. Bile
C. Saliva
D. Gastrin only
Correct Answer: A
Rationale: Converts pepsinogen to pepsin for protein digestion.
7. The small intestine is the primary site for:
A. Nutrient absorption
B. Gas exchange
C. RBC production
D. Urine formation
Correct Answer: A
Rationale: Villi and microvilli increase surface area for absorption.
8. Bile is produced by the:
A. Liver
B. Gallbladder
C. Pancreas
D. Stomach
Correct Answer: A
Rationale: Bile emulsifies fats to aid digestion.
9. Bile is stored in the:
, A. Gallbladder
B. Liver
C. Pancreas
D. Duodenum
Correct Answer: A
Rationale: Releases bile into the small intestine when fats are
present.
10. The pancreas secretes:
A. Digestive enzymes and bicarbonate
B. Bile only
C. Hydrochloric acid only
D. Saliva only
Correct Answer: A
Rationale: Enzymes digest carbohydrates, proteins, and fats;
bicarbonate neutralizes stomach acid.
11. The large intestine primarily:
A. Absorbs water and electrolytes
B. Absorbs proteins
C. Secretes bile
D. Produces insulin
Correct Answer: A
Rationale: Forms and stores feces while recovering water.
12. The main structural units of the liver are:
