Nokea
In a clinical research study on intestinal motility, a 24-year-old male graduate student is involved. The peristalsis of the small intestine:
- A. Aids in the mixing of the food bolus
- B. Is regulated by the central nervous system (CNS)
- C. Includes the contraction of circular smooth muscle both behind and in front of the food bolus
- D. Encompasses the contraction of circular smooth muscle behind the food bolus and the relaxation of circular smooth muscle in front of the bolus
Correct Answer: D
Rationale: Peristalsis involves circular muscle contraction behind the bolus and relaxation ahead, propelling it forward.
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Which of the given enzymes is responsible for the digestion of milk protein?
- A. Erepsin
- B. Trypsin
- C. Pepsin
- D. Rennin
Correct Answer: D
Rationale: Rennin is responsible for the digestion of milk protein. Rennin is present in the human body in its inactive form called prorenin. When we consume milk, it reacts with the hydrochloric acid present in the stomach. Hydrochloric acid activates the inert prorenin and converts it into active Rennin.
Match: Protein
- A. composed of amino acids; building blocks for body tissues
- B. major source of energy
- C. used for insulation
- D. stored as glycogen
Correct Answer: A
Rationale: Proteins are macromolecules composed of amino acids, essential for building and repairing body tissues.
Dietary fibres are very much required in our daily food, so as to?
- A. To provide extra protein
- B. To balance the insulin secreted by pancreas
- C. To help our body get rid of undigested food
- D. To decrease tiredness
Correct Answer: C
Rationale: Dietary fiber aids in digestion by adding bulk to stool and helping the body eliminate undigested food, promoting regular bowel movements.
What happens during the intestinal phase of digestion?
- A. Food is swallowed
- B. Chyme is processed and nutrients absorbed
- C. Water is absorbed
- D. Saliva breaks down starch
Correct Answer: B
Rationale: In the intestinal phase, chyme is mixed with pancreatic juice and bile, and nutrients are absorbed primarily in the small intestine.
Based on knowledge of the pancreas's role in digestion, what substance produced by the pancreas may be required as a supplement for long-term health management after its surgical removal?
- A. Pancreatic enzymes
- B. Vitamin B12
- C. Gastrin
- D. Bile salts
Correct Answer: A
Rationale: Pancreatic enzyme supplements are needed post-pancreatectomy to aid digestion.