Nokea
Nasal chambers and buccal cavity are separated by-
- A. By uvula
- B. By palate
- C. By tongue
- D. None of these
Correct Answer: B
Rationale: The palate (hard and soft) separates the nasal chambers from the buccal cavity.
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Peristalsis moves food material:
- A. in the stomach and small intestine only
- B. in the small and large intestines only
- C. in the stomach and small and large intestines only
- D. from the pharynx to the anal canal
Correct Answer: D
Rationale: Peristalsis is a wave-like muscle contraction that moves food material through the entire gastrointestinal tract.
Based on knowledge of the pancreas's role in digestion, what substance produced by the pancreas may be required as a supplement for long-term health management after its surgical removal?
- A. Pancreatic enzymes
- B. Vitamin B12
- C. Gastrin
- D. Bile salts
Correct Answer: A
Rationale: Pancreatic enzyme supplements are needed post-pancreatectomy to aid digestion.
The intracellular canaliculi of parietal cells, all true except:
- A. Provides large surface area for ion pumps & ion transport.
- B. H+ ion result from degradation of (H2CO3) by carbonic anhydrase
- C. Carry ribosomes & continuous with rER around nucleus
- D. Carry more microvilli when the cell is active in HCl secretion
Correct Answer: C
Rationale: Intracellular canaliculi are not continuous with rER; they are specialized for ion transport and expand with microvilli during secretion.
Four bags made of partially permeable membrane are placed in tubes as shown in the diagram. bag made of partially permable membrane starch solution water reducing sugar solution water starch solution and saliva water tube 1 tube 2 tube 3 tube 4 saliva water After 20 minutes at 35 oC a sample of water from each tube, outside the bag, is boiled with Benedict's solution. What are the results?
- A. tube 1: blue, tube 2: red, tube 3: blue, tube 4: red
- B. tube 1: blue, tube 2: blue, tube 3: red, tube 4: red
- C. tube 1: red, tube 2: blue, tube 3: blue, tube 4: red
- D. tube 1: red, tube 2: red, tube 3: blue, tube 4: blue
Correct Answer: A
Rationale: Only reducing sugars can pass through the membrane, turning Benedict's solution red, while starch cannot.
What happens during the intestinal phase of digestion?
- A. Food is swallowed
- B. Chyme is processed and nutrients absorbed
- C. Water is absorbed
- D. Saliva breaks down starch
Correct Answer: B
Rationale: In the intestinal phase, chyme is mixed with pancreatic juice and bile, and nutrients are absorbed primarily in the small intestine.