Nokea
In case of atrophic gastritis, deficiency in vitamin B12 result from damage of:
- A. Chief cells
- B. Enterocytes
- C. Parietal cells
- D. Stem cells
Correct Answer: C
Rationale: Parietal cells secrete intrinsic factor, necessary for vitamin B12 absorption; their damage in atrophic gastritis leads to B12 deficiency.
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Which type of fat can cause heart disease if consumed in high quantities?
- A. carbohydrates
- B. saturated
- C. calories
- D. unsaturated
Correct Answer: B
Rationale: Saturated fats, when consumed excessively, can increase cholesterol levels, leading to heart disease.
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.
Exocrine portion of pancreas show the following EXCEPT:
- A. Formed of pure serous acini with centroacinar cells
- B. Its duct system is rich in striated ducts
- C. Secretion of bicarbonate is stimulated by secretin hormone.
- D. Secretion of enzymes is stimulated by cholecystokinin
Correct Answer: B
Rationale: The pancreatic duct system has intercalated ducts, not striated ducts, which are characteristic of salivary glands.
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.
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.