an essential nutrient is one that
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HESI LPN

LPN Nutrition Practice Test

1. An essential nutrient is one that ___

Correct answer: C

Rationale: An essential nutrient is a substance that cannot be made in sufficient quantities by the body itself, so it must be obtained from the diet. Choice A is incorrect because essential nutrients are required in specific amounts, not necessarily large quantities. Choice B is incorrect as essential nutrients cannot be synthesized by the body at all. Choice D is incorrect because although essential nutrients may be used in the synthesis of other compounds, that is not the defining characteristic of an essential nutrient.

2. What is a common side effect of the antibiotic tetracycline in children?

Correct answer: A

Rationale: Discoloration of teeth is a well-known side effect of tetracycline, especially when administered to children below 8 years of age. Tetracycline can bind to calcium ions in developing teeth, causing them to become discolored and appear yellow or brown. Increased appetite, elevated blood glucose levels, and decreased bone density are not commonly associated with the use of tetracycline in children, making them incorrect choices.

3. Which statement best describes the relationship between diet and chronic diseases?

Correct answer: B

Rationale: Choice B is the correct answer. A poor diet can increase the risk of developing chronic diseases due to the lack of essential nutrients or the presence of harmful components like excessive sugar, salt, or saturated fats. While diet plays a significant role in the development of chronic diseases, it is not the sole cause (choice C). Choice A is incorrect because diet does indeed have a significant impact on chronic diseases. Choice D is not the best answer as it does not acknowledge the negative impact of a poor diet on chronic diseases.

4. What is the first-line treatment for a child with a bacterial ear infection?

Correct answer: B

Rationale: The correct answer is B: Oral antibiotics. Oral antibiotics are the first-line treatment for bacterial ear infections in children as they effectively target the infection at the source and help alleviate symptoms. Intravenous antibiotics (Choice A) are typically reserved for severe cases where oral antibiotics are not sufficient. Nasal decongestants (Choice C) and antihistamines (Choice D) are not the primary treatments for bacterial ear infections. Nasal decongestants are used for nasal congestion, and antihistamines are used for allergies. However, these medications do not directly address the bacterial infection in the ear, unlike oral antibiotics.

5. Which of the following statements about nutrition is true?

Correct answer: D

Rationale: The correct answer is D. Nutrient recommendations are designed to meet the needs of most healthy people, providing guidelines for a balanced diet. Choice A is incorrect because while nutrition plays a crucial role in health, it is not the only factor influencing it. Choice B is incorrect as nutrient needs vary based on factors like age, gender, activity level, and health status. Choice C is incorrect because all nutrients are essential for different bodily functions, and none can be deemed universally more important than others.

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