what is a key dietary consideration for a child with phenylketonuria pku

HESI LPN

LPN Nutrition Practice Test

1. What is a key dietary consideration for a child with phenylketonuria (PKU)?

A. High-fiber diet
B. Low-phenylalanine diet
C. Increased dairy intake
D. High-sodium diet

Correct answer: B

Rationale: A low-phenylalanine diet is crucial for managing PKU to prevent neurological damage and maintain normal development. Phenylalanine is an amino acid found in protein-containing foods, and individuals with PKU have difficulty metabolizing it. Consuming foods low in phenylalanine helps prevent the buildup of toxic byproducts in the body. Choices A, C, and D are incorrect. A high-fiber diet, increased dairy intake, and high-sodium diet are not specific dietary considerations for PKU management. In fact, dairy products are a source of protein and phenylalanine, which should be limited in PKU.

2. Which nutrient is an organic compound?

A. salt
B. water
C. calcium
D. vitamin C

Correct answer: D

Rationale: Vitamin C is the correct answer because it is an organic compound containing carbon, which is a defining characteristic of organic compounds. Salt (choice A), water (choice B), and calcium (choice C) are inorganic compounds that do not contain carbon. Inorganic compounds are typically lacking carbon-hydrogen bonds, unlike organic compounds. Therefore, choices A, B, and C are incorrect in the context of being organic compounds.

3. What is the main function of proteins in the body?

A. They provide structural components for the body.
B. They assist in the absorption of vitamins.
C. They help with the transport of nutrients in the blood.
D. They help maintain fluid balance in the body.

Correct answer: A

Rationale: The main function of proteins in the body is to provide structural components like muscles, skin, and bones. Proteins are essential for growth, repair, and maintenance of body tissues. While proteins play a role in various physiological functions, their primary function is not to assist in the absorption of vitamins (Choice B), help with the transport of nutrients in the blood (Choice C), or maintain fluid balance (Choice D).

4. What is the most common symptom of appendicitis in children?

A. Vomiting and diarrhea
B. Fever and abdominal pain
C. Rash and joint pain
D. Difficulty breathing

Correct answer: B

Rationale: The correct answer is B: Fever and abdominal pain. In children, appendicitis commonly presents with fever and abdominal pain. The pain typically begins around the umbilicus and then moves to the lower right quadrant. Choices A, C, and D are incorrect because vomiting and diarrhea, rash and joint pain, and difficulty breathing are not typical symptoms of appendicitis in children.

5. What should be assessed in an infant diagnosed with hypertrophic pyloric stenosis?

A. Diarrhea after each feeding
B. Gastric pain and vigorous crying
C. Poor appetite due to poor sucking reflex
D. An olive-shaped mass right of the midline

Correct answer: D

Rationale: In hypertrophic pyloric stenosis, an olive-shaped mass can often be palpated in the infant's abdomen, which is a hallmark sign of this condition. This mass is located in the right upper quadrant of the abdomen, right of the midline. Choices A, B, and C are incorrect because while infants with hypertrophic pyloric stenosis may experience vomiting (not diarrhea), gastric pain, and irritability, and have feeding difficulties, the key assessment finding specific to this condition is the palpable olive-shaped mass in the abdomen.