Nokea
What is the primary function of carbohydrates as a food source?
- A. Regulate metabolic processes.
- B. Build body tissue.
- C. Supply energy.
- D. Provide bulk.
Correct Answer: C
Rationale: The primary function of carbohydrates as a food source is to supply energy. Carbohydrates are the body's main source of energy, providing fuel for various physiological functions. Choice A is incorrect because carbohydrates do not primarily regulate metabolic processes; that role is mainly attributed to enzymes and hormones. Choice B is incorrect because proteins are primarily responsible for building body tissue. Choice D is incorrect because fiber, not all carbohydrates, provides bulk in the diet.
You may also like to solve these questions
What types of muscular movement occur in the intestine?
- A. Longitudinal and circular.
- B. Expulsion and traction.
- C. Tonus and clonus.
- D. Intermittent and continuous.
Correct Answer: A
Rationale: The correct answer is A: Longitudinal and circular. Longitudinal and circular muscles are responsible for the movements that help propel food through the intestine. Choice B, expulsion and traction, is incorrect as these terms do not specifically relate to the types of muscular movement in the intestine. Choice C, tonus and clonus, refers to different types of muscle contractions and are not the primary movements in the intestine. Choice D, intermittent and continuous, does not accurately describe the specific types of muscular movement that occur in the intestine.
Major nutrients supplied by foods in the Vegetables group of MyPlate include:
- A. potassium and vitamin A.
- B. iron and vitamin C.
- C. calcium and vitamin B12.
- D. sodium and vitamin E.
Correct Answer: A
Rationale: The correct answer is A: potassium and vitamin A. Vegetables are an excellent source of potassium and vitamin A, both essential for maintaining overall health. Iron and vitamin C (choice B) are commonly found in foods from the Protein and Fruits groups, respectively. Calcium and vitamin B12 (choice C) are more abundant in dairy products and animal-based foods. Sodium and vitamin E (choice D) are not the major nutrients typically supplied by vegetables.
What does the Tolerable Upper Intake Level (UL) represent?
- A. a replacement for Recommended Dietary Allowances (RDAs).
- B. a safe level of intake for people of all ages.
- C. a potentially toxic level of intake of a nutrient.
- D. the highest amount of a nutrient that can be safely consumed.
Correct Answer: D
Rationale: The Tolerable Upper Intake Level (UL) represents the highest amount of a nutrient that can be safely consumed without causing adverse health effects. It is not a replacement for Recommended Dietary Allowances (RDAs) (choice A) which are nutrient intake recommendations. While the UL is established to prevent toxicity, it is not a completely safe level for people of all ages (choice B). It is also not a potentially toxic level of intake of a nutrient (choice C), but rather the level that is unlikely to cause adverse health effects.
The mineral that helps control enzyme actions in cell mitochondria that produce and store high-energy compounds is:
- A. iron.
- B. cobalt.
- C. hemoglobin.
- D. vitamin B12.
Correct Answer: A
Rationale: The correct answer is iron. Iron is essential for enzyme function and energy production within the mitochondria. While cobalt is important for certain enzymes, it is not the primary mineral involved in this specific function. Hemoglobin is a protein in red blood cells that carries oxygen, not a mineral involved in enzyme actions. Vitamin B12 is crucial for nerve function and DNA synthesis but is not directly related to controlling enzyme actions in mitochondria.
Which of the following provides the best source of nutrients?
- A. specific food combinations.
- B. a variety of foods.
- C. individual foods.
- D. a variety of food supplements.
Correct Answer: B
Rationale: A variety of foods is the best source of nutrients because it ensures a balanced intake of all essential nutrients required by the body. Option A, specific food combinations, may not provide all necessary nutrients as relying on only a few types of food may lead to deficiencies. Option C, individual foods, also may not provide a complete range of nutrients necessary for overall health. Option D, a variety of food supplements, is not the best source of nutrients as whole foods are generally more beneficial due to their natural nutrient composition and bioavailability.