what is the primary source of energy for the brain and nervous system
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LPN Nutrition Practice Test

1. What is the primary source of energy for the brain and nervous system?

Correct answer: D

Rationale: Glucose is the correct answer as it is the primary source of energy for the brain and nervous system. The brain relies heavily on glucose to function optimally. While protein and fat play essential roles in the body, they are not the primary sources of energy for the brain and nervous system. Carbohydrates, on the other hand, are broken down into glucose, which is then used as fuel by the brain and nervous system.

2. What dietary recommendation should be made to a child with iron-deficiency anemia?

Correct answer: B

Rationale: The correct recommendation for a child with iron-deficiency anemia is to include high-iron foods like spinach, red meat, and beans in their diet. These foods are rich sources of iron and can help address the deficiency. Choice A is incorrect as dairy products do not provide significant iron content. Choice C is incorrect because protein intake does not need to be decreased; in fact, lean meats are good sources of iron. Choice D is also incorrect as whole grains can be a part of a healthy diet and do not need to be avoided in this case.

3. What is the primary goal in managing a child with cystic fibrosis?

Correct answer: B

Rationale: The primary goal in managing a child with cystic fibrosis is to prevent lung infections. Cystic fibrosis primarily affects the respiratory system, leading to thick mucus buildup in the lungs, which increases the risk of infections. Preventing lung infections through proper respiratory care, medications, airway clearance techniques, and vaccinations is crucial in managing cystic fibrosis. While dietary interventions like increasing dietary fat intake, ensuring high protein intake, and promoting physical activity are also important aspects of cystic fibrosis management, preventing lung infections takes precedence as it directly addresses a major complication of the condition.

4. What is a common early sign of type 1 diabetes in children?

Correct answer: A

Rationale: Excessive thirst and frequent urination are common early signs of type 1 diabetes in children. These symptoms occur due to high blood glucose levels, leading to increased thirst and urination. Severe abdominal pain (choice B) is not typically associated with type 1 diabetes. Although frequent headaches (choice C) can occur in some cases, they are not as specific to type 1 diabetes as excessive thirst and frequent urination. Sudden weight gain (choice D) is not a common early sign of type 1 diabetes; in fact, unexplained weight loss is more characteristic of the condition.

5. What is a common side effect of corticosteroid therapy in children?

Correct answer: A

Rationale: The correct answer is A: Increased appetite. Corticosteroid therapy commonly causes increased appetite in children. This side effect can lead to weight gain and other metabolic changes. Option B is incorrect because corticosteroid therapy is more likely to result in increased blood glucose levels. Option C is incorrect because corticosteroid therapy can inhibit growth due to its impact on the endocrine system. Option D is incorrect because corticosteroid therapy can lead to mood changes such as irritability or even mood swings rather than improved mood.

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