A patient who reports stomach ulcers should avoid all the following foods, except one. Which is the exception?
- A. Proteins
- B. Caffeine
- C. Calcium
- D. Wheat
Correct Answer: D
Rationale: Patients with stomach ulcers are advised to avoid foods that can increase stomach acid levels, such as caffeine, proteins, and calcium. Wheat, on the other hand, is generally well-tolerated by individuals with ulcers as it does not stimulate gastric secretions. Therefore, the correct answer is D. Choice A (Proteins), B (Caffeine), and C (Calcium) are not recommended for patients with stomach ulcers due to their potential to exacerbate symptoms.
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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
Rationale: The correct answer is B: vitamin D and vitamin B12. Vegans may need to supplement vitamin D and B12 as these nutrients are mainly found in animal products. While choices A, C, and D are essential vitamins, they are not typically lacking in a vegan diet. Vitamin C can be obtained from various plant sources, vitamin A can be derived from beta-carotene in plants, and vitamin E and K are also found in plant-based foods. Niacin, although important, can be sourced from plant-based sources and is not a common deficiency in vegan diets.
What type of drug is lamivudine, used for the management of HIV infection?
- A. CCR5 antagonist
- B. fusion inhibitor
- C. nucleoside reverse transcriptase inhibitor
- D. protease inhibitor
Correct Answer: C
Rationale: Lamivudine belongs to the class of nucleoside reverse transcriptase inhibitors (NRTIs), making choice C the correct answer. NRTIs like lamivudine work by inhibiting the reverse transcriptase enzyme, an essential component for the HIV virus to replicate. Choices A, B, and D are incorrect because lamivudine does not function as a CCR5 antagonist, fusion inhibitor, or protease inhibitor in the management of HIV infection.
In comparison to infants born to women of normal weight, infants born to obese women are _____.
- A. less likely to have heart defects
- B. more likely to be of very low birthweight
- C. less likely to experience a complicated birth
- D. more likely to have neural tube defects
Correct Answer: D
Rationale: Infants born to obese women are more likely to have neural tube defects compared to infants born to women of normal weight. This increased risk is attributed to factors such as poor maternal nutrition and increased inflammation during pregnancy. Choice A is incorrect because infants born to obese women have a higher risk of heart defects. Choice B is incorrect as infants born to obese women are more likely to have higher birthweights. Choice C is incorrect as obese women are more likely to experience complications during birth.
Which nutrient has the highest satiety value?
- A. Complex carbohydrates
- B. High-quality protein
- C. Low-quality protein
- D. Fat
Correct Answer: D
Rationale: Fat has the highest satiety value among the listed nutrients. It slows down digestion, stays in the stomach longer, and provides a sustained release of energy, leading to increased feelings of fullness and satisfaction. Complex carbohydrates can also contribute to satiety, but fat generally has a stronger effect. High-quality protein is important for satiety as well, but it is generally not as filling as fat. Low-quality protein does not have as significant satiating effects as high-quality protein or fat.
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
Rationale: The correct answer is B. Viscous (soluble) fiber binds with bile acids in the intestine, which are then excreted. The liver must use cholesterol to make more bile acids, thereby lowering blood cholesterol levels. Choice A is incorrect as insoluble fiber does not bind with cholesterol in the large intestine. Choice C is incorrect as soluble fiber does not directly bind with cholesterol in the blood. Choice D is incorrect as insoluble fiber does not convert to bile in the large intestine to bind with cholesterol.