Nokea
Which of the following enzyme is secreted by pancreas -
- A. Maltase
- B. Trypsin
- C. Rennin
- D. Lactase
Correct Answer: B
Rationale: Trypsin, a proteolytic enzyme, is secreted by the pancreas.
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Teeth adapted to shear food are:
- A. premolars
- B. canines
- C. incisors
- D. molars
Correct Answer: C
Rationale: Incisors are sharp-edged teeth designed for cutting or shearing food.
The function of the parietal cells of the stomach is to:
- A. Secrete pepsinogen for protein digestion
- B. Secrete mucus for lubrication
- C. Secrete the hormone gastrin
- D. Produce intrinsic factor required for absorption of vitamin B12
Correct Answer: D
Rationale: Parietal cells produce intrinsic factor, essential for vitamin B12 absorption, and hydrochloric acid, not the other functions listed.
Which part of the digestion process speeds up the break down of food?
- A. enzymes
- B. peristalsis
- C. villi
- D. bile
Correct Answer: A
Rationale: Enzymes are biological catalysts that accelerate the chemical breakdown of food.
Concerning Circumvallate papilla the following is true EXCEPT:
- A. Most numerous type of the lingual papillae.
- B. Its sides carry about 250 taste buds.
- C. Has underlying Von Ebner's glands.
- D. Surrounded by circular groove.
Correct Answer: A
Rationale: Circumvallate papillae are the least numerous (about 8-12 in humans), not the most numerous, and they carry many taste buds with Von Ebner's glands.
(Auerbach's) plexus found in:
- A. Muscularis externa
- B. Submucosa
- C. Mucosa
- D. Serosa
Correct Answer: A
Rationale: Auerbach's plexus is located between the circular and longitudinal layers of the muscularis externa, controlling gut motility.