Nursing Elites

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

• A. Sodium
• B. Potassium
• C. Calcium
• D. Magnesium

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.

2. Each statement regarding the correlation between vitamin D and sun exposure is accurate, except one. Which is the exception?

• A. The body can produce sufficient amounts of vitamin D from sunlight.
• B. UV radiation can convert a precursor of vitamin D to vitamin D3 by penetrating uncovered skin.
• C. Sunscreen blocks the formation of vitamin D3.
• D. By the age of 70 years, the skin generally produces vitamin D at only half the level it did at the age of 20 years.

Correct answer: C

Rationale: While UV radiation can penetrate uncovered skin and convert a precursor of vitamin D to vitamin D3, sunscreen does block the formation of vitamin D3. Sunscreen is recommended by dermatologists to prevent sunburn and reduce the risk of skin cancer. The other choices are correct: the body can produce sufficient vitamin D from sunlight, UV radiation can convert a precursor of vitamin D to vitamin D3, and skin generally produces less vitamin D as a person ages.

3. A client with cholecystitis is being taught about required dietary modifications. Which of the following foods is appropriate for the client's diet?

• A. Creamed chicken
• B. Roast turkey
• C. Ice cream
• D. Macaroni and cheese

Correct answer: B

Rationale: Roast turkey is the most appropriate choice for a client with cholecystitis. Foods that are high in fat content, like creamed chicken, ice cream, and macaroni and cheese, should be avoided in cholecystitis as they can exacerbate symptoms due to the reduced ability of the gallbladder to process fats. Roast turkey is a leaner option that is better tolerated by individuals with cholecystitis.

4. A client is being taught about foods to include in a low-fiber diet. Which statement indicates the client understands the teaching?

• A. "A fresh pear would be a good snack option."?
• B. "I can prepare refried beans for supper."?
• C. "Bran cereal would be a good breakfast choice."?
• D. "I should choose white rice as a side dish."?

Correct answer: D

Rationale: The correct answer is "I should choose white rice as a side dish." In a low-fiber diet, foods that are low in fiber are recommended to reduce gastrointestinal irritation. White rice is a low-fiber option suitable for this diet. Choices A, B, and C are high-fiber options and not suitable for a low-fiber diet. A fresh pear, refried beans, and bran cereal are all high in fiber, which should be avoided in a low-fiber diet.

5. Which systemic disease is best controlled with the DASH diet, monitoring blood pressure, limiting sodium, alcohol, and caffeine, reducing stress, and losing weight?

• A. Hypertension
• B. Diabetes mellitus
• C. Parkinson's disease
• D. Anemia

Correct answer: A

Rationale: The correct answer is A: Hypertension. The DASH diet is specifically designed to control hypertension by reducing sodium intake, managing blood pressure, and promoting overall cardiovascular health. Choice B, Diabetes mellitus, is managed through monitoring blood sugar levels and a balanced diet rich in whole grains, fruits, and vegetables. Choice C, Parkinson's disease, is a neurological disorder that is not primarily managed through diet modifications. Choice D, Anemia, is a condition characterized by a lack of healthy red blood cells and is typically managed by addressing the underlying cause and sometimes iron supplementation, not by the methods mentioned in the question.

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