how much energy is required to raise the temperature of one kilogram liter of water 1c

HESI LPN

Nutrition Final Exam

1. 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.

2. 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.

3. What is an important dietary consideration for a child with celiac disease?

A. Increased iron intake
B. Gluten-free diet
C. High-protein diet
D. Low-sodium diet

Correct answer: B

Rationale: A gluten-free diet is crucial for managing celiac disease in children because it helps prevent intestinal damage and alleviate symptoms. Gluten is a protein found in wheat, barley, and rye, and it triggers an immune response in individuals with celiac disease, damaging the lining of the small intestine. Therefore, choices A, C, and D are incorrect. While iron intake is important for overall health, a child with celiac disease can still meet their iron needs through sources that are naturally gluten-free or fortified. A high-protein diet or a low-sodium diet are not specifically required for managing celiac disease.

4. 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.

5. Which measure best describes the amounts of nutrients that should be consumed by the population?

A. The Dietary Reference Intakes, as they provide a set of nutrient intake values for healthy people in the United States and Canada
B. The Tolerable Upper Intake levels, as they indicate the maximum daily amount of a nutrient considered safe for most healthy people
C. The Estimated Average Requirements, as they reflect the average daily amount of a nutrient needed to maintain a specific function in half of the healthy individuals of a population
D. The Recommended Dietary Allowances, as they represent the average daily amount of a nutrient considered adequate to meet the known nutrient needs of practically all healthy individuals

Correct answer: D

Rationale: The Recommended Dietary Allowances (RDAs) are the best measure to describe the amounts of nutrients that should be consumed by the population. RDAs represent the average daily intake level that meets the nutrient requirements of nearly all (97-98%) healthy individuals in a particular life stage and gender group. Choice A, the Dietary Reference Intakes, provide a set of nutrient intake values but do not specifically address the average daily amount of a nutrient considered adequate for practically all individuals. Choice B, the Tolerable Upper Intake levels, focus on the maximum daily amount of a nutrient deemed safe for most healthy people, not the average daily amount needed. Choice C, the Estimated Average Requirements, reflect the average daily amount of a nutrient needed by half of the healthy individuals, which is not as comprehensive as the RDAs that cater to nearly all healthy people.