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PN Nutrition Assessment ATI
1. The body of scientific knowledge related to nutritional requirements for human growth, maintenance, activity, and reproduction is known as:
- A. physiology.
- B. nutrition science.
- C. biochemistry.
- D. dietetics.
Correct answer: B
Rationale: The correct answer is B: nutrition science. Nutrition science specifically focuses on studying the requirements and functions of nutrients in relation to human growth, maintenance, activity, and reproduction. Choice A, physiology, deals more with the functions of living organisms and their parts, not specifically related to nutrients. Choice C, biochemistry, focuses on the chemical processes and substances that occur within living organisms, not specifically centered on nutritional requirements. Choice D, dietetics, involves the application of nutritional knowledge in planning and managing diets for individuals, but it is more focused on the practical aspect rather than the broader scientific study of nutritional requirements.
2. In addition to calcium, the major minerals needed to build and maintain bone tissue include:
- A. potassium
- B. iron
- C. phosphorus
- D. fluoride
Correct answer: C
Rationale: The correct answer is C: phosphorus. Phosphorus, along with calcium, is essential for bone health and maintenance. Potassium (choice A) is important for muscle function, iron (choice B) is crucial for red blood cell production, and fluoride (choice D) helps prevent tooth decay but is not a major mineral needed for bone tissue.
3. 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.
4. Individual nutrients are characterized by their ability to:
- A. work independently.
- B. fulfill specific metabolic roles.
- C. influence weight loss.
- D. improve mental status.
Correct answer: B
Rationale: The correct answer is B: 'fulfill specific metabolic roles.' Nutrients play essential roles in specific metabolic processes in the body such as energy production, tissue repair, and growth. Choice A, 'work independently,' is incorrect as nutrients often work synergistically rather than alone. Choice C, 'influence weight loss,' is incorrect as while some nutrients may support weight loss indirectly through metabolic processes, it is not their primary characteristic. Choice D, 'improve mental status,' is also incorrect as while some nutrients are important for brain health, their primary role is not specifically to improve mental status.
5. 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.
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