Nokea
Stomach is the main site for the digestion of -
- A. Fats
- B. Carbohydrate
- C. Protein
- D. All of these
Correct Answer: C
Rationale: The stomach primarily digests proteins via pepsin.
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Lysozyme breakdown
- A. Protein
- B. Sugar
- C. Bacterium
- D. Fat
Correct Answer: C
Rationale: Lysozyme targets and breaks down bacterial cell walls.
What is the role of mucus secreted by the stomach?
- A. To protect the lining of the stomach
- B. To digest fats
- C. To kill the germs in the food
- D. To digest the proteins
Correct Answer: A
Rationale: Mucus or Gastric mucus is a gel barrier secreted by epithelial cells & glandular cells in the stomach wall. It protects the inner lining of the stomach from HCl.
The juxtaglomerular cells secrete what hormone?
- A. Renin
- B. ADH
- C. Angiotensin
- D. Adrenalin
Correct Answer: A
Rationale: Juxtaglomerular cells secrete renin to regulate blood pressure and filtration.
Which type of motility in the large intestine helps in the absorption of water and electrolytes?
- A. Peristalsis
- B. Segmentation
- C. Mass movements
- D. Swallowing
Correct Answer: B
Rationale: Segmentation in the large intestine involves rhythmic contractions that mix contents, increasing contact time with the mucosa for water and electrolyte absorption.
The large intestine lacks:
- A. goblet cells
- B. epiploic appendages
- C. plicae circulares
- D. haustra
Correct Answer: C
Rationale: The large intestine lacks plicae circulares, which are present in the small intestine to increase surface area.