Nursing Elites

1. What physiologic role does magnesium play in the body?

• A. Blood clotting, transmission of nerve impulses, muscle contraction and relaxation
• B. Calcium homeostasis, structural integrity of heart muscle
• C. No known metabolic function, caries-preventing properties
• D. ATP energy release; metabolism of fats, carbohydrates, proteins; regulates acid-base balance

Correct answer: B

Rationale: The correct answer is B. Magnesium plays an important role in maintaining calcium homeostasis and preventing skeletal abnormalities. It is involved in more than 300 enzymatic reactions, including energy metabolism, insulin activity, and glucose use. Magnesium is vital to the structural integrity of heart muscle and other muscles and nerves. While magnesium does play a role in blood clotting, nerve impulses, muscle contraction, relaxation, ATP energy release, and metabolism of fats, carbohydrates, proteins, the primary physiologic role of magnesium in the body is related to calcium homeostasis and maintaining the structural integrity of the heart muscle. Choice A is incorrect because it includes functions of magnesium, but they are not its primary physiologic role. Choice C is incorrect as magnesium has several known metabolic functions. Choice D is incorrect because although magnesium is involved in ATP energy release and metabolism, its primary role is related to calcium homeostasis and structural integrity of muscle.

2. A nurse is teaching a group of adults about nutrition. The nurse should include which of the following amounts as an appropriate daily intake of fiber for adult women?

• A. 5 to 10 g
• B. 10 to 15 g
• C. 20 to 35 g
• D. 40 to 50 g

Correct answer: C

Rationale: The correct answer is 20 to 35 g. This range is the recommended daily intake of fiber for adult women. Fiber is essential for maintaining a healthy digestive system and overall well-being. Option A (5 to 10 g) is too low and may not provide sufficient fiber intake. Option B (10 to 15 g) is also below the recommended range. Option D (40 to 50 g) is too high and can lead to gastrointestinal discomfort and other complications if consumed in excess.

3. The purpose of chest percussion and vibration is to loosen secretions in the lungs. The difference between the procedures is:

• A. Percussion uses only one hand, while vibration uses both hands
• B. Percussion delivers cushioned blows to the chest with cupped palms, while vibration gently shakes secretions loose
• C. In both percussion and vibration, the hands are not on top of each other, and hand action is not in tune with the client's breath
• D. Percussion slaps the chest to loosen secretions, while vibration shakes the secretions along with the inhalation

Correct answer: D

Rationale: Chest percussion involves the use of rhythmic tapping to dislodge mucus from the lungs, facilitating its movement toward the larger airways where it can be expelled. This technique is particularly important in conditions where mucus retention is a significant risk factor for infection. The key difference between chest percussion and vibration is that percussion involves slapping the chest to loosen secretions, while vibration involves shaking the secretions along with the inhalation, aiding in moving the loosened secretions upwards for easier removal. Choices A, B, and C do not accurately describe the main difference between chest percussion and vibration, making them incorrect.

4. Plant stanols and sterols help to lower LDL cholesterol and are often added to which food product?

• A. margarine
• B. milk
• C. cereal
• D. yogurt

Correct answer: A

Rationale: Plant stanols and sterols are commonly added to margarine to help lower LDL cholesterol levels. Margarine acts as a vehicle for these compounds, making it easier for individuals to incorporate them into their daily diet. While milk, cereal, and yogurt are healthy food options, they are not typically enriched with plant stanols and sterols for cholesterol-lowering purposes, making them less likely candidates as the correct answer.

5. Diet therapy for Rudy, who has acute renal failure is low-protein, low potassium and low sodium. The nutrition instructions should include:

• A. Recommend protein of high biologic value like eggs, poultry and lean meats
• B. Encourage client to include raw cucumbers, carrot, cabbage, and tomatoes
• C. Allowing the client cheese, canned foods and other processed food
• D. Bananas, cantaloupe, orange and other fresh fruits can be included in the diet

Correct answer: B

Rationale: Nursing interventions should be grounded in a deep understanding of the physiological processes involved, ensuring that care provided is both effective and efficient.

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