why is it important to use randomization in a scientific experiment
Logo

Nursing Elites

HESI LPN

HESI PN Nutrition Practice Exam

1. Why is randomization important in a scientific experiment?

Correct answer: B

Rationale: Randomization is crucial in a scientific experiment to eliminate bias in the assignment of subjects to groups. By randomly assigning subjects, it helps ensure that any differences observed in the outcomes are due to the experimental treatment and not to preexisting differences between groups. Choice A is incorrect because randomization does not guarantee representativeness but rather minimizes the impact of confounding variables. Choice C is not entirely accurate; while randomization can contribute to accuracy and validity, its primary purpose is to reduce bias. Choice D is incorrect as the goal of randomization is not to balance the number of subjects but to prevent systematic differences between groups.

2. What is an important aspect of care for a child with congenital adrenal hyperplasia?

Correct answer: A

Rationale: The correct answer is A: Monitoring electrolyte levels. In the management of congenital adrenal hyperplasia, it is crucial to monitor electrolyte levels to prevent imbalances and related complications. Restricting physical activity (choice B) is not a typical aspect of care for this condition. Administering high doses of vitamin A (choice C) is not a standard treatment for congenital adrenal hyperplasia and can be harmful in excess. Providing a high-protein diet (choice D) may be beneficial for some conditions but is not a specific requirement for managing congenital adrenal hyperplasia.

3. After surgical repair of a cleft palate, what should be used to prevent injury to the suture line?

Correct answer: C

Rationale: The correct answer is C: Syringe. Using a syringe helps in feeding without causing injury to the suture line after cleft palate repair because it avoids direct contact with the suture area. Straws and spoons can potentially put pressure on the suture line, leading to injury. Cups may not provide the necessary control to prevent contact with the suture line, unlike a syringe.

4. What is a common treatment for a child with a urinary tract infection (UTI)?

Correct answer: B

Rationale: Oral antibiotics are the correct choice for treating a child with a urinary tract infection (UTI). They are often prescribed to effectively address the infection and alleviate symptoms. Intravenous antibiotics (Choice A) are usually reserved for severe cases where oral antibiotics are not feasible or effective. Increased fluid intake (Choice C) can help in flushing out bacteria but is not a standalone treatment for UTIs. Topical antibiotics (Choice D) are not typically used to treat UTIs as they are more suited for skin infections.

5. What is an important dietary consideration for a child with cystic fibrosis?

Correct answer: A

Rationale: For a child with cystic fibrosis, an important dietary consideration is a high-calorie, high-fat diet. This type of diet helps address malabsorption issues commonly seen in individuals with cystic fibrosis and supports adequate growth and development. High-calorie, high-fat foods are recommended to help meet the increased energy needs of these individuals. Choices B, C, and D are not the most appropriate dietary considerations for a child with cystic fibrosis. A low-sugar diet may not provide enough calories for optimal growth, increased dietary fiber may exacerbate issues related to malabsorption, and a high-sodium diet is generally not recommended due to the risk of dehydration and electrolyte imbalances in individuals with cystic fibrosis.

Similar Questions

Why is peer review important in scientific research?
How should the healthcare provider respond to a parent concerned about a child's short stature?
How should a healthcare professional handle a child with a new diagnosis of ADHD?
What dietary recommendation is essential for a child with phenylketonuria (PKU)?
What is the first-line treatment for a child with a bacterial ear infection?

Access More Features

HESI LPN Basic
$69.99/ 30 days

  • 5,000 Questions with answers
  • All HESI courses Coverage
  • 30 days access

HESI LPN Premium
$149.99/ 90 days

  • 5,000 Questions with answers
  • All HESI courses Coverage
  • 30 days access

Other Courses