Nokea
Pancreatic acinar cells, the following is true except:
- A. Contain basal basophilic striations
- B. Have receptors for cholecystokinin (secreted by enteroendocrine cells in intestine)
- C. Have receptors for cholecystokinin acetyl choline (for autonomic control)
- D. Secrete pepsinogen enzyme for protein digestion
Correct Answer: D
Rationale: Pancreatic acinar cells secrete digestive enzymes like amylase and lipase, not pepsinogen, which is from gastric chief cells.
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After digestion, Protein is converted into ?
- A. Glucose
- B. Sucrose
- C. Fat
- D. Amino Acid
Correct Answer: D
Rationale: Proteins are broken down into amino acids during digestion, primarily by enzymes like pepsin in the stomach and trypsin in the small intestine, for absorption and use by the body.
Each part of the alimentary canal has the optimum pH for the enzymes that digest food there. What is the optimum pH for an enzyme that works in the stomach?
- A. pH 2
- B. pH 7
- C. pH 9
- D. pH 12
Correct Answer: A
Rationale: The stomach's acidic environment (around pH 2) is optimal for the function of pepsin, which breaks down proteins.
Which of the following structures is a common passageway for both food and air?
- A. Nasopharynx
- B. Oropharynx
- C. Esophagus
- D. Trachea
Correct Answer: B
Rationale: The oropharynx serves as a common pathway for food (to the esophagus) and air (to the laryngopharynx and trachea), unlike the other options.
Disaccharides are digested by
- A. secretin
- B. disaccharidase
- C. lipase
- D. pepsin
Correct Answer: B
Rationale: Disaccharidases, such as sucrase, lactase, and maltase, digest disaccharides into monosaccharides for absorption.
How should the student explain the normal function of the pancreas in the process of digestion?
- A. Produces enzymes for digestion
- B. Stores bile
- C. Secretes gastrin
- D. Absorbs nutrients
Correct Answer: A
Rationale: The pancreas produces digestive enzymes (e.g., trypsin, amylase) for breaking down proteins, carbohydrates, and fats.