you have been asked to help a top nutrition researcher conduct human experiments on vitamin c as the subjects walk into the laboratory you distribute

HESI LPN

HESI PN Nutrition Practice Exam

1. You have been asked to help a top nutrition researcher conduct human experiments on vitamin C. As the subjects walk into the laboratory, you distribute all the vitamin C pill bottles to the girls and all the placebo pill bottles to the boys. What should you have done?

A. Giving all the boys the vitamin C and the girls the placebo, and telling them what they were getting.
B. Distributing the bottles randomly, randomizing the subjects, and telling them what they were getting.
C. Telling the subjects which group they were in, but preventing yourself from knowing the contents of the pill bottles.
D. Preventing yourself from knowing what is in the pill bottles, and distributing the bottles randomly to the subjects.

Correct answer: D

Rationale: The correct approach in a scientific experiment is to prevent yourself from knowing the contents of the pill bottles and distribute them randomly to the subjects. This randomization helps to avoid bias and ensures that the results are not influenced by preconceived notions. Option A is incorrect because it introduces gender bias by assigning pills based on gender. Option B is incorrect as it mentions telling the subjects what they are getting, which could lead to placebo effects. Option C is incorrect as it suggests disclosing group information to the subjects, which can also introduce bias.

2. What role do fats play in the human body?

A. They provide a concentrated source of energy.
B. They are the building blocks of enzymes and hormones.
C. They are essential for brain function and development.
D. They aid in the digestion of food.

Correct answer: D

Rationale: Fats play various essential roles in the human body, one of which is aiding in the digestion of food. While fats do provide a concentrated source of energy, the primary source is carbohydrates. Proteins are the building blocks of enzymes and hormones, not fats. Essential fatty acids found in fats are vital for brain function and development, but this is not the primary role of fats in the body.

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

A. Increased appetite
B. Decreased blood glucose levels
C. Inhibited growth
D. Mood changes

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.

4. A weight reduction regimen calls for a daily intake of 1400 kilocalories, which includes 30 grams of fat. What percentage of the total energy is contributed by fat?

A. 8.50%
B. 15.00%
C. 19.00%
D. 25.50%

Correct answer: C

Rationale: To calculate the percentage of total energy contributed by fat, first determine the energy from fat by multiplying the fat amount (30g) by the energy density of fat (9 kcal/g), which equals 270 kcal. Then, divide the energy from fat (270 kcal) by the total energy intake (1400 kcal) and multiply by 100 to find the percentage: (270 kcal / 1400 kcal) * 100 = 19.29% ≈ 19.00%. Therefore, fat contributes approximately 19% of the total energy in the diet. Choice A (8.50%) is too low, while choices B (15.00%) and D (25.50%) are incorrect calculations based on the given information.

5. What is an important consideration when caring for a child with epilepsy?

A. Adherence to prescribed anticonvulsant medication
B. Avoiding all forms of exercise
C. Limiting social interactions
D. Increasing dietary caffeine intake

Correct answer: A

Rationale: Adherence to prescribed anticonvulsant medication is crucial when caring for a child with epilepsy. It is essential for managing the condition effectively and reducing the frequency of seizures. Choice B is incorrect because exercise, when done safely and under supervision, can be beneficial for children with epilepsy by promoting overall health. Choice C is incorrect as social interactions are important for the child's emotional well-being and should not be limited. Choice D is incorrect as increasing dietary caffeine intake can potentially trigger seizures in some individuals with epilepsy.