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What are the actions involved in the process of digestion?
- A. thermal and chemical.
- B. chemical and segmental.
- C. muscular and chemical.
- D. mechanical and thermal.
Correct Answer: C
Rationale: The correct answer is C: 'muscular and chemical.' In the process of digestion, muscular movements help in mixing and propelling food along the digestive tract, while chemical breakdowns involving enzymes and acids break down food into smaller molecules for absorption. Choices A, B, and D are incorrect as thermal, segmental, and mechanical actions are not the primary actions involved in the digestion process.
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Which of the following are considered micronutrients?
- A. Fats.
- B. Proteins.
- C. Vitamins.
- D. Carbohydrates.
Correct Answer: C
Rationale: Micronutrients are essential nutrients needed by the body in small quantities to support various bodily functions. Vitamins fall under this category as they play crucial roles in metabolism, immune function, and overall health. While fats, proteins, and carbohydrates are essential macronutrients required in larger amounts for energy and growth, they are not classified as micronutrients. Therefore, the correct answer is C.
What is the main body storage form of carbohydrates?
- A. Glycogen.
- B. Starch.
- C. Fat.
- D. Glucose.
Correct Answer: A
Rationale: The correct answer is A: Glycogen. Glycogen is the stored form of carbohydrates in the body, primarily found in the liver and muscles. Starch (choice B) is a carbohydrate storage molecule in plants, not in the human body. Fat (choice C) is a different macronutrient and not the main storage form of carbohydrates. Glucose (choice D) is a simple sugar that serves as an energy source, not the main storage form of carbohydrates.
An example of government nutrition policy is:
- A. MyPlate Food Guidance System.
- B. Dietary Guidelines for Americans 2010.
- C. Healthy People 2020.
- D. Dietary Reference Intakes (DRIs).
Correct Answer: C
Rationale: The correct answer is C: Healthy People 2020. Healthy People 2020 is a government initiative that sets goals for improving the health of Americans, including specific nutritional objectives. Choices A, B, and D are not examples of government nutrition policies. MyPlate Food Guidance System is a visual tool to help individuals make healthy food choices, Dietary Guidelines for Americans 2010 provide evidence-based advice for Americans two years and older, and Dietary Reference Intakes (DRIs) are a set of nutrient reference values.
A food choice equivalent to one serving from the Grains group of MyPlate is:
- A. one slice of bread
- B. 2 cups of rice
- C. 3 cups of spaghetti
- D. 4 oz of ready-to-eat cereal
Correct Answer: A
Rationale: One slice of bread is a standard serving from the Grains group in MyPlate. This choice aligns with the recommended portion size for grains. Choices B, C, and D are excessive portions that do not represent a single serving according to MyPlate guidelines. 2 cups of rice, 3 cups of spaghetti, and 4 oz of ready-to-eat cereal exceed the standard serving size for grains and would provide more than one serving from this food group.
How many kilocalories (kcal) are provided by a food containing 30 grams of carbohydrate?
- A. 90
- B. 120
- C. 180
- D. 270
Correct Answer: B
Rationale: The correct answer is B: 120. Carbohydrates provide 4 kcal per gram, so 30 grams of carbohydrates will provide 120 kcal. This is calculated by multiplying the grams of carbohydrate (30) by the kcal per gram (4). Choices A, C, and D are incorrect because they do not reflect the correct calculation based on the energy content of carbohydrates.