Nokea
Each statement is true of swallowing and processing food, except one. Which is the exception?
- A. The swallowing reflex moves a bolus into the esophagus
- B. A bolus is a mass of food
- C. The bolus is transported to the stomach by osmosis and gravity
- D. The bolus penetrates the diaphragm through the esophageal hiatus
Correct Answer: C
Rationale: The correct answer is C. The bolus is not transported to the stomach by osmosis and gravity, but by peristalsis. Peristalsis is the involuntary constriction and relaxation of muscles to push the bolus through the digestive system. Choices A, B, and D are correct statements. A bolus is indeed a mass of food, the swallowing reflex does move the bolus into the esophagus, and the bolus does not penetrate the diaphragm through the esophageal hiatus; instead, it enters the stomach through the lower esophageal sphincter.
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Correct Answer: C
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A woman who has been following a vegan diet may need ____ supplements.
- A. vitamin C and vitamin A
- B. vitamin D and vitamin B12
- C. vitamin E and K
- D. vitamin D and niacin
Correct Answer: B
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Dietary fiber has been recommended for its possible benefits in reducing heart disease by lowering blood cholesterol. How is fiber thought to play its role in lowering blood cholesterol?
- A. Insoluble fiber binds with cholesterol in the large intestine and is excreted in feces
- B. Viscous fiber binds with bile in the intestine and is excreted in feces
- C. Soluble fiber binds with cholesterol in the blood and is excreted by the liver
- D. Insoluble fiber converts to bile in the large intestine and binds with cholesterol
Correct Answer: B
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- A. Vitamin A
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- C. Vitamin D
- D. Vitamin E
Correct Answer: B
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- A. Carbohydrates
- B. Protein
- C. Fats
- D. Fiber
Correct Answer: C
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