Nokea
Kupffer cells, one of the following is not true:
- A. May contain Hemosiderin granules
- B. Motile within liver blood sinusoids
- C. Phagocytic cells present mainly in space of Disse
- D. Form part of the liver sinusoidal wall
Correct Answer: C
Rationale: Kupffer cells are phagocytic and part of the sinusoidal wall, but they are in the lumen, not the space of Disse.
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About soft palate, all true Except:
- A. Separates nasopharynx upwards from oropharynx downwards
- B. Superior surface covered by stratified columnar
- C. Stratified squamous non-keratinized epithelium on inferior surface
- D. Contain striated muscle with strong connective tissue between muscle bundles.
Correct Answer: B
Rationale: The superior surface of the soft palate is covered by pseudostratified ciliated columnar epithelium (respiratory epithelium), not stratified columnar, due to its proximity to the nasopharynx.
Which type of digestion breaks down pieces of food into small molecules?
- A. chemical digestion
- B. peristalsis digestion
- C. mechanical digestion
- D. absorption digestion
Correct Answer: A
Rationale: Chemical digestion uses enzymes to break food into small molecules.
In pancreas, pancreatic juice and hormone are secreted by-
- A. Islets of Langerhans
- B. Cells of Acini and Islets of Langerhans respectively
- C. Islets of Langerhans and cells of Acini respectively
- D. None of these.
Correct Answer: B
Rationale: Pancreatic juice is secreted by acinar cells, and hormones by Islets of Langerhans.
Obstruction of the common bile duct by gallstones would most likely affect the digestion of:
- A. carbohydrates
- B. fats
- C. proteins
- D. nucleic acids
Correct Answer: B
Rationale: Bile is essential for the emulsification and digestion of fats. An obstruction in the common bile duct would impair fat digestion.
Which process matches the definition: Circular muscles behind a bolus of food contract and longitudinal muscles relax, thus pushing a bolus of food onwards?
- A. Segmentation
- B. Peristalsis
- C. Emesis
- D. Deglutition
Correct Answer: B
Rationale: Peristalsis involves coordinated muscle contractions to push food forward.