which mineral is a principal component of cell membranes
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Nursing Elites

ATI RN

ATI Nutrition Proctored Exam 2023

1. Which mineral is a principal component of cell membranes?

Correct answer: A

Rationale: Phosphorus is the correct answer. It is a key component of cell membranes, being part of the phospholipid bilayer that provides structure and controls the movement of substances in and out of cells. Magnesium, iron, and iodine do not serve as principal components of cell membranes. Magnesium is involved in various enzymatic reactions, iron is essential for oxygen transport, and iodine plays a role in thyroid hormone synthesis.

2. What is tocopherol?

Correct answer: D

Rationale: Tocopherol is another name for Vitamin E, a fat-soluble antioxidant that helps protect cell membranes from oxidative damage. Choices A, B, and C are incorrect as tocopherol is specifically related to Vitamin E and not Vitamin B1, B2, or B3.

3. Which of the following foods is the best source of omega-3 fatty acids?

Correct answer: A

Rationale: Salmon is the correct answer as it is a rich source of omega-3 fatty acids, specifically EPA and DHA, which are known to be beneficial for heart health. Chicken, spinach, and eggs do not contain significant levels of omega-3 fatty acids compared to salmon. While eggs do contain some omega-3s, the amount is considerably lower than what is found in fatty fish like salmon.

4. How many words does a typical 12-month-old infant use?

Correct answer: D

Rationale: A typical 12-month-old infant typically uses very few words, with 'mama' and 'papa' being common early words. At this age, most infants are still in the early stages of language development, and their vocabulary is limited. Choices A, B, and C suggest higher word counts which are not typical for infants at this age.

5. Which of the following terms refers to a process by which an individual receives education about the recognition of stress reactions and management strategies for handling stress, which may be instituted after a disaster?

Correct answer: A

Rationale: Critical incident stress management is a process that provides individuals with education about recognizing stress reactions and strategizing management techniques for handling stress after a disaster. Choice B, 'Follow-up', is incorrect because it generally refers to continuing care after initial treatment, not specifically to stress management education. Choice C, 'Debriefing', is a process where individuals involved in a critical event are brought together to discuss the event and their reactions to it. It can be part of the critical incident stress management process, but it doesn't cover the whole process. Choice D, 'Defusion', is a technique used in the immediate aftermath of a traumatic event to help individuals process their experiences, but it does not encompass the full range of education about stress recognition and management strategies.

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