Nursing Elites

1. What is the term for the study of how diet affects gene expression?

• A. Epigenetics
• B. Nutrigenomics
• C. Genomics
• D. Genetics

Correct answer: B

Rationale: Nutrigenomics is the study of how diet affects gene expression, influencing health outcomes and disease risk. Epigenetics (choice A) involves changes in gene expression or cellular phenotype caused by mechanisms other than changes in the underlying DNA sequence. Genomics (choice C) is the study of an organism's entire genome. Genetics (choice D) is the study of heredity and the variation of inherited characteristics.

2. What is the study of how a person's genes interact with nutrients?

• A. genetic counseling
• B. nutritional genomics
• C. genetic metabolomics
• D. nutritional genetics

Correct answer: B

Rationale: Nutritional genomics, the correct answer, specifically focuses on how a person's genes interact with nutrients, affecting health and disease. Genetic counseling (choice A) refers to the process of helping people understand and adapt to the medical, psychological, and familial implications of genetic contributions to disease. Genetic metabolomics (choice C) combines genetic and metabolomic data to study metabolic pathways. Nutritional genetics (choice D) generally refers to the broader field of genetics as it relates to nutrition, while nutritional genomics, the most precise term, delves into the specific gene-nutrient interactions.

3. What is one primary factor that influences nutrient needs in individuals?

• A. Age
• B. Gender
• C. Genetics
• D. Physical activity level

Correct answer: A

Rationale: Correct. Age is one of the primary factors influencing nutrient needs. Different life stages, such as infancy, childhood, adulthood, and old age, require varying amounts of nutrients. Gender (choice B) can influence nutrient needs to some extent, but age plays a more significant role. Genetics (choice C) may affect how individuals metabolize certain nutrients but is not a primary factor in determining overall nutrient needs. Physical activity level (choice D) can impact energy requirements but is not as fundamental as age in influencing overall nutrient needs.

4. How much energy is required to raise the temperature of one kilogram of water by 1°C?

• A. 10 calories
• B. 100 calories
• C. 1 kilocalorie
• D. 10 kilocalories

Correct answer: C

Rationale: The correct answer is 1 kilocalorie. This is the amount of energy required to raise the temperature of 1 kilogram of water by 1°C. Choice A (10 calories) and Choice D (10 kilocalories) are incorrect as they do not represent the correct unit of measurement for this specific scenario. Choice B (100 calories) is also incorrect as it overestimates the amount of energy required. The specific heat capacity of water is approximately 1 calorie/gram °C, which means that 1 kilogram (1000 grams) of water requires 1 kilocalorie (1000 calories) to raise its temperature by 1°C.

5. What is an important aspect of managing a child with chronic kidney disease?

• A. Monitoring electrolyte levels
• B. Increasing protein intake
• C. Limiting fluid intake
• D. Encouraging a high-fat diet

Correct answer: A

Rationale: Monitoring electrolyte levels is crucial in managing chronic kidney disease in children because imbalances can lead to serious complications. Electrolyte levels must be carefully monitored to prevent issues such as electrolyte abnormalities, which can further impact kidney function and overall health. Choices B, C, and D are incorrect because increasing protein intake, limiting fluid intake, and encouraging a high-fat diet can exacerbate kidney disease in children by putting extra strain on their kidneys or causing other health problems.

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