what does the term essential nutrient refer to

HESI LPN

HESI PN Nutrition Practice Exam

1. What does the term 'essential nutrient' refer to?

A. A nutrient that can be synthesized by the body.
B. A nutrient that is required for proper body functioning.
C. A nutrient that must be obtained from the diet because the body cannot produce it.
D. A nutrient that can be stored in the body for long periods.

Correct answer: C

Rationale: The correct answer is C. An essential nutrient is a substance that is necessary for normal body functioning but cannot be synthesized in adequate amounts by the body, therefore it must be obtained from the diet. Choices A, B, and D are incorrect because essential nutrients are not synthesized by the body, they are necessary for body functioning, and they are not typically stored in the body for long periods.

2. What is one benefit of using controls in an experiment?

A. The size of the groups does not matter.
B. The subjects are unaware of the experiment's details.
C. The subjects who are treated are balanced against the placebos.
D. The subjects are similar in all respects except for the treatment being tested.

Correct answer: D

Rationale: The correct answer is D. Controls in an experiment ensure that the subjects are similar in all respects except for the treatment being tested. This allows for a fair comparison between the treatment group and the control group. Choice A is incorrect because the size of the groups is not the primary benefit of using controls. Choice B is incorrect as blinding, not controls, refers to subjects not knowing about the experiment. Choice C is incorrect as it pertains more to randomization than the use of controls.

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

A. Prevent triggering asthma attacks
B. Avoid triggering asthma attacks
C. Administer corticosteroids
D. Increase physical activity

Correct answer: B

Rationale: The primary goal in managing a child with asthma is to avoid triggering asthma attacks. This involves managing allergens, ensuring proper medication use, and creating an asthma action plan. Choice A is incorrect because the goal is to avoid triggering asthma attacks, not necessarily to prevent recurrent infections. Choice C is incorrect as corticosteroids are a treatment option but not the primary goal of asthma management. Choice D is incorrect because although physical activity is important, the primary goal is to prevent asthma attacks and manage symptoms effectively.

4. What is an important consideration when administering medications to a child with a history of chronic renal failure?

A. Increased frequency of medication administration
B. Adjustments in dosage due to altered drug metabolism
C. Avoidance of all medications
D. Use of only intravenous medications

Correct answer: B

Rationale: When administering medications to a child with chronic renal failure, it is crucial to consider adjustments in dosage due to altered drug metabolism. Children with chronic renal failure may have impaired drug excretion, leading to potential drug accumulation and toxicity. Increasing the frequency of medication administration (choice A) may not address the altered drug metabolism issue and could increase the risk of adverse effects. Avoiding all medications (choice C) is not practical or safe as some medications may be necessary for the child's health. Using only intravenous medications (choice D) is not always required and may not be the best route of administration for all medications needed.

5. How should hydration status be assessed in a child with vomiting and diarrhea?

A. Check skin turgor and mucous membranes
B. Measure blood glucose levels
C. Assess heart rate and blood pressure
D. Evaluate bowel sounds

Correct answer: A

Rationale: Checking skin turgor and mucous membranes is the appropriate method to assess hydration status in a child with vomiting and diarrhea. Skin turgor is an indicator of skin elasticity, which decreases when an individual is dehydrated. Mucous membranes, such as the inside of the mouth, can also show signs of dehydration like dryness. Measuring blood glucose levels (choice B) is not relevant to assessing hydration status in this scenario. Assessing heart rate and blood pressure (choice C) is important in evaluating the overall condition of a child but may not directly indicate hydration status. Evaluating bowel sounds (choice D) is more related to assessing gastrointestinal function rather than hydration status.