what is one reason why peer review is important in scientific research
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HESI PN Nutrition Practice Exam

1. Why is peer review important in scientific research?

Correct answer: C

Rationale: Peer review is crucial in scientific research to verify the accuracy and validity of research findings. By subjecting research papers to evaluation by experts in the field, peer review ensures that the study's methods, results, and conclusions are robust and reliable. This process helps to maintain high standards of quality in scientific publications, providing credibility to the research. Choices A and D are incorrect because the primary purpose of peer review is not to expedite publication or solely enhance credibility; its core function is to validate the research's accuracy and validity. Choice B, while beneficial, is not the primary reason for peer review; replication is a byproduct of the rigorous evaluation of research methods and findings.

2. In what units are energy measurements expressed by most scientists and nutritionists outside the United States?

Correct answer: C

Rationale: Kilojoules are the standard units of energy used by most scientists and nutritionists worldwide. Newtons are units of force, liters are units of volume, and kilocalories are more commonly used in the United States but not as widely adopted internationally for energy measurements. Therefore, the correct answer is 'kilojoules.'

3. Approximately how many milliliters are contained in a half-cup of milk?

Correct answer: C

Rationale: A half-cup of milk is equivalent to approximately 120 milliliters. This conversion is standard and commonly used in cooking and baking. Choice A (50 milliliters) is too low for a half-cup measurement. Choice B (85 milliliters) is also lower than the standard half-cup measurement of 120 milliliters. Choice D (170 milliliters) is too high for a half-cup, making it an incorrect option.

4. What is a common symptom of a respiratory infection in infants?

Correct answer: A

Rationale: Wheezing is a common symptom of respiratory infections in infants, often associated with coughing and difficulty breathing. It occurs due to the narrowing of the airways. Choice B, 'High appetite,' is incorrect as respiratory infections usually lead to a decrease in appetite rather than an increase. Choice C, 'Increased thirst,' is incorrect as it is not a typical symptom of a respiratory infection in infants. Choice D, 'Lethargy,' can be a symptom of respiratory infections but is not as specific and common as wheezing.

5. How should a healthcare provider address the nutritional needs of a child with chronic kidney disease?

Correct answer: B

Rationale: Reducing sodium and phosphorus intake is crucial in managing chronic kidney disease in children because it helps prevent complications such as electrolyte imbalances and bone problems. High protein intake can actually be harmful to the kidneys in this condition as it can lead to increased waste production. A high-fat diet is not recommended as it can contribute to heart and blood vessel problems. Encouraging frequent sugary snacks can lead to further complications like obesity and diabetes, which are not beneficial for a child with chronic kidney disease.

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