what is the main function of proteins in the body
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Nutrition Final Exam

1. What is the main function of proteins in the body?

Correct answer: A

Rationale: The main function of proteins in the body is to provide structural components like muscles, skin, and bones. Proteins are essential for growth, repair, and maintenance of body tissues. While proteins play a role in various physiological functions, their primary function is not to assist in the absorption of vitamins (Choice B), help with the transport of nutrients in the blood (Choice C), or maintain fluid balance (Choice D).

2. What term describes foods that contain non-nutrient substances whose known action in the body is to promote well-being to a greater extent than that contributed by the food's nutrients?

Correct answer: C

Rationale: Functional foods are specifically designed to promote health benefits beyond basic nutrition. Fortified foods (choice A) are those with added nutrients that are not originally present, enriched foods (choice B) have nutrients added back that were lost during processing, and health-enhancing foods (choice D) is a vague and less specific term compared to functional foods.

3. What is an important aspect of managing a child with ADHD?

Correct answer: B

Rationale: Consistent behavior management strategies are crucial when managing a child with ADHD. By implementing consistent strategies, such as clear rules, positive reinforcement, and structure, it helps the child improve focus, manage impulsivity, and regulate their behavior. Choice A, 'Increasing academic workload,' is incorrect as overwhelming a child with ADHD with more academic tasks can exacerbate their symptoms. Choice C, 'Restricting all physical activity,' is also incorrect as physical activity is beneficial for children with ADHD to release excess energy and improve focus. Choice D, 'Encouraging solitary activities,' is not ideal as social interaction and engagement with others are important for a child's development and well-being.

4. You have been asked to help a top nutrition researcher conduct human experiments on vitamin C. As the subjects walk into the laboratory, you distribute all the vitamin C pill bottles to the girls and all the placebo pill bottles to the boys. What should you have done?

Correct answer: D

Rationale: The correct approach in a scientific experiment is to prevent yourself from knowing the contents of the pill bottles and distribute them randomly to the subjects. This randomization helps to avoid bias and ensures that the results are not influenced by preconceived notions. Option A is incorrect because it introduces gender bias by assigning pills based on gender. Option B is incorrect as it mentions telling the subjects what they are getting, which could lead to placebo effects. Option C is incorrect as it suggests disclosing group information to the subjects, which can also introduce bias.

5. What is a common symptom of congenital heart disease in infants?

Correct answer: B

Rationale: Difficulty breathing is a common symptom of congenital heart disease in infants. Infants with congenital heart disease may experience difficulty breathing due to impaired cardiac function, which affects the heart's ability to pump blood effectively. This symptom is often due to issues like heart failure or fluid accumulation in the lungs. Excessive weight gain (Choice A) is not typically associated with congenital heart disease in infants. High blood pressure (Choice C) is less common in infants with congenital heart disease compared to adults. Increased appetite (Choice D) is not a typical symptom of congenital heart disease in infants.

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