Nokea
Out of four layers of alimentary canal, which one forms villi, (finger-like projection)?
- A. Serosa
- B. Mucosa
- C. Submucosa
- D. Muscularis
Correct Answer: B
Rationale: The mucosa layer forms villi, increasing the surface area for absorption in the small intestine.
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Removal of waste from body in the form of undigested food is called
- A. Digestion
- B. Absorption
- C. Assimilation
- D. Egestion
Correct Answer: D
Rationale: Egestion is the removal of undigested waste from the body.
What are the advantages of chewing food at the start of digestion?
- A. increasing surface area
- B. lubricating food
- C. making food soluble
- D. all of the above
Correct Answer: D
Rationale: Chewing increases the surface area for enzyme action, lubricates food with saliva, and helps dissolve food particles.
Which of the following is not a source of protein?
- A. broccoli
- B. red meat
- C. beans
- D. rice
Correct Answer: A
Rationale: Broccoli contains some protein but is primarily a source of vitamins and fiber, not a primary protein source like meat or beans.
The following cells are found in gastric glands EXCEPT:
- A. Parietal cells
- B. Goblet cells
- C. Chief cells
- D. Argentaffine cells.
Correct Answer: B
Rationale: Goblet cells are found in the intestines, not gastric glands, which contain parietal, chief, and argentaffin (enteroendocrine) cells.
Parotid gland, all true except:
- A. Secrete 25% of salivary secretion
- B. Formed mainly of mixed acini
- C. Has prominent striated ducts
- D. Its inflammation results in mumps
Correct Answer: B
Rationale: The parotid gland is purely serous, not mixed, secreting watery saliva rich in enzymes.