which physiologic role does vitamin c play in the body

ATI RN

ATI Nutrition Proctored Exam

1. Which physiologic role does vitamin C play in the body?

A. Transcribing DNA to RNA
B. Absorption and regulation of calcium
C. Protects integrity of cellular membranes
D. Catalyst for synthesis of blood-clotting factors

Correct answer: C

Rationale: Vitamin C plays a crucial role in protecting the integrity of cellular membranes. It is essential for collagen synthesis, which is important for wound healing and maintaining skin, blood vessels, and other tissues. Choice A is incorrect as the transcription of DNA to RNA is facilitated by vitamin A. Choice B is incorrect as calcium absorption and regulation are functions of vitamin D. Choice D is incorrect as vitamin K serves as a catalyst for the synthesis of blood-clotting factors, not vitamin C.

2. Which breakfast item should be recommended for a vegan adolescent to combine protein?

A. Bagel with cream cheese
B. Wheat toast with jelly
C. Oatmeal pancakes with peanut butter
D. Eggs with tofu bacon

Correct answer: C

Rationale: Oatmeal pancakes with peanut butter provide a protein combination suitable for a vegan diet.

3. In order to establish and maintain successful breastfeeding, which practice should a lactating mother try to follow?

A. Initiate breastfeeding within 24 hours of birth
B. Breastfeed on a schedule of every 2 to 3 hours
C. Give a pacifier to an infant between feedings
D. Find a breastfeeding support group to troubleshoot problems

Correct answer: D

Rationale: The correct answer is D. Finding a breastfeeding support group is crucial for a lactating mother to establish and maintain successful breastfeeding. This group can offer valuable advice, tips, and encouragement, helping the mother troubleshoot any issues that may arise during breastfeeding. Choices A, B, and C are incorrect because breastfeeding is a natural process that should not be overly scheduled, and giving a pacifier between feedings can interfere with establishing proper breastfeeding techniques.

4. A nurse is reinforcing dietary teaching with a client who has vitamin A deficiency. Which of the following food choices should the nurse recommend as the best source of vitamin A?

A. 1 small baked sweet potato
B. 1 cup avocado
C. 1 cup green beans
D. 1 large apple

Correct answer: A

Rationale: The correct answer is A. Sweet potatoes are rich in beta-carotene, which the body converts into vitamin A, essential for vision and immune function. Avocado (choice B) is a good source of healthy fats but not high in vitamin A. Green beans (choice C) are nutritious but not a significant source of vitamin A. Apples (choice D) are low in vitamin A compared to sweet potatoes.