what is a causative factor of hirschsprung disease

HESI LPN

HESI PN Nutrition Practice Exam

1. What is a causative factor of Hirschsprung disease?

A. Frequent evacuation of solids, liquids, and gases
B. Excessive peristaltic movement
C. Absence of parasympathetic ganglion cells in a portion of the colon
D. One portion of the bowel telescoping into another

Correct answer: C

Rationale: The correct answer is C: Absence of parasympathetic ganglion cells in a portion of the colon. Hirschsprung disease is a congenital condition characterized by the absence of nerve cells (ganglia) in parts of the colon. This absence leads to a lack of peristalsis in the affected segment, resulting in severe constipation and bowel obstruction. Choices A, B, and D are incorrect. Choice A describes symptoms of diarrhea rather than a causative factor of Hirschsprung disease. Excessive peristaltic movement (choice B) is not a causative factor but rather the opposite, as Hirschsprung disease is associated with reduced peristalsis. Choice D, which refers to intussusception, is a different condition unrelated to Hirschsprung disease.

2. How should a caregiver manage a child with a known allergy to peanuts?

A. Avoid all peanut-containing products
B. Encourage regular exposure to peanuts
C. Administer antihistamines daily
D. Recommend peanut-containing supplements

Correct answer: A

Rationale: Avoiding peanut-containing products is crucial for managing a peanut allergy and preventing allergic reactions. Choice B suggesting regular exposure to peanuts can be harmful and trigger severe allergic reactions in a child with a peanut allergy. Regular exposure can increase the risk of anaphylaxis. Choice C of administering antihistamines daily is not a primary prevention strategy and should not be the first-line approach for managing a peanut allergy. Antihistamines only treat symptoms and do not prevent the allergic reaction. Choice D of recommending peanut-containing supplements can also lead to severe allergic reactions and is not recommended for a child with a known peanut allergy. It is essential to eliminate all sources of peanuts to prevent accidental exposure and potential life-threatening reactions.

3. How should a healthcare professional respond to a parent concerned about their child's weight gain?

A. Provide guidance on healthy eating and physical activity
B. Suggest restrictive dieting
C. Recommend increased caloric intake
D. Avoid discussing the issue

Correct answer: A

Rationale: When a parent expresses concern about their child's weight gain, the most appropriate response is to provide guidance on healthy eating and physical activity. This approach promotes healthy weight management and overall well-being. Suggesting restrictive dieting (Choice B) can be harmful, especially for children, as it may lead to unhealthy relationships with food and potential nutritional deficiencies. Recommending increased caloric intake (Choice C) without proper assessment and guidance can exacerbate the issue. Avoiding discussing the issue (Choice D) neglects a critical opportunity to address the parent's concerns and support the child's health.

4. In the scientific method, a tentative solution to a problem is called a what?

A. theory
B. prediction
C. hypothesis
D. correlation

Correct answer: C

Rationale: In the scientific method, a hypothesis is a tentative solution or educated guess that is tested through research. A theory (choice A) is a well-substantiated explanation based on evidence and extensive testing. A prediction (choice B) is a statement about what will happen in the future based on existing knowledge. Correlation (choice D) refers to a mutual relationship between two or more things, indicating how they may change together but not providing a solution to a problem.

5. What is an important consideration when administering medications to a child with hepatic dysfunction?

A. Increased dosing intervals
B. Adjustments in dosage due to altered metabolism
C. Avoid all medications
D. Use only topical medications

Correct answer: B

Rationale: When administering medications to a child with hepatic dysfunction, it is crucial to make adjustments in dosage due to altered metabolism. Hepatic dysfunction can affect the way medications are metabolized in the body, potentially leading to drug toxicity or reduced effectiveness. This is why adjusting the dosage is essential to ensure the medication is both safe and efficient. Choices A, C, and D are incorrect because increasing dosing intervals, avoiding all medications, or using only topical medications do not address the specific issue of altered drug metabolism in hepatic dysfunction.