each is a physiologic role of vitamin d except one which is the exception
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Nursing Elites

ATI RN

ATI Nutrition Proctored Exam

1. Each is a physiologic role of vitamin D, except one. Which is the exception?

Correct answer: A

Rationale: The correct answer is A, Hematopoiesis. Vitamin D plays a crucial role in regulating serum calcium levels, which is essential for maintaining cardiac and neuromuscular function. Additionally, vitamin D is involved in modulating immune responses. However, hematopoiesis, the formation of red blood cells, is not a direct physiologic role of vitamin D. Therefore, hematopoiesis is the exception among the listed functions of vitamin D.

2. The substance that is most supportive of bones and teeth is:

Correct answer: B

Rationale: Collagen is a key structural protein in bones and teeth, providing support and strength.

3. If it is determined that a child is being physically abused by a parent, what would be the most important goal for the nurse to establish with the family?

Correct answer: A

Rationale: The primary objective when dealing with cases of child abuse is to ensure the safety of the child and any siblings. This means creating a secure environment free from harm, which is why choice 'A' is the correct answer. While choices 'B', 'C', and 'D' might be subsequent steps in a comprehensive plan to deal with the situation, they are not the immediate priority. Understanding abusive behavioral patterns or improving the relationship with the counselor will not directly lead to the child's safety. Likewise, teaching the mother to apply verbal discipline doesn't guarantee the child's safety if the abusive behavior continues. Therefore, these options are not the most important initial goal.

4. The principal cation in plasma and interstitial fluid is:

Correct answer: A

Rationale: The principal cation in plasma and interstitial fluid is sodium. Sodium plays a crucial role in maintaining fluid balance and is the primary cation in extracellular fluids like plasma and interstitial fluid. Potassium is the primary cation within cells, not in extracellular fluids, making it an incorrect choice. Calcium and magnesium are essential minerals but are not the principal cations in plasma and interstitial fluid, so they are also incorrect choices.

5. Medication for treating high blood cholesterol levels should not be used for most people unless:

Correct answer: D

Rationale: The correct answer is choice D because medication for high cholesterol is typically not considered unless Therapeutic Lifestyle Changes (TLC), which include diet and exercise, have not proven effective after a three-month period. This approach ensures that lifestyle modifications are given a fair chance to lower cholesterol levels before resorting to medication. Choice A is incorrect because the number of risk factors for coronary heart disease does not dictate when to begin medication; it is about the effectiveness of lifestyle changes. Choice B is incorrect as the duration of coronary heart disease symptoms does not determine when to start medication; the focus is on the response to TLC. Choice C is incorrect because the coverage of prescription drugs by the patient's insurance does not influence the medical decision to use medication for high cholesterol; it is based on medical necessity and effectiveness of prior interventions.

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