Nursing Elites

1. Which cells in the islet of the pancreas are responsible for synthesizing insulin?

• A. Alpha cells
• B. Beta cells
• C. Gamma cells
• D. Delta cells

Correct answer: B

Rationale: Beta cells in the islets of Langerhans in the pancreas are responsible for the production and secretion of insulin, which is crucial for regulating blood glucose levels. Alpha cells, on the other hand, produce glucagon, a hormone that raises blood glucose levels. Gamma cells and Delta cells do not exist in the islets of Langerhans; therefore, they are incorrect choices.

2. Which individual would be at the greatest risk for deficiencies in water-soluble vitamins?

• A. An individual who regularly consumes fruits and vegetables.
• B. An individual with a high intake of dairy products.
• C. An individual who consumes a diet high in processed foods.
• D. An individual who frequently eats organ meats.

Correct answer: C

Rationale: The correct answer is 'An individual who consumes a diet high in processed foods.' Processed foods are often deficient in water-soluble vitamins such as vitamin C and B vitamins, which can lead to deficiencies. On the other hand, fruits, vegetables, and organ meats are rich sources of these vitamins, so individuals who consume these regularly are less likely to develop deficiencies. While dairy products do contain some water-soluble vitamins, they are not depleted as quickly as they are in a diet high in processed foods, making a deficiency less likely.

3. How many diet-related major risk factors for coronary heart disease does Mrs. Winslow have?

• A. 1
• B. 4
• C. 2
• D. 3

Correct answer: B

Rationale: Mrs. Winslow has four major diet-related risk factors for coronary heart disease: high total cholesterol, high LDL cholesterol, high triglycerides, and low HDL cholesterol. Choice A is incorrect because there are more than one risk factor present. Choices C and D are incorrect as they do not account for the total number of diet-related major risk factors identified.

4. Which of the following foods is the best source of omega-3 fatty acids?

• A. Salmon
• B. Chicken
• C. Spinach
• D. Eggs

Correct answer: A

Rationale: Salmon is the correct answer as it is a rich source of omega-3 fatty acids, specifically EPA and DHA, which are known to be beneficial for heart health. Chicken, spinach, and eggs do not contain significant levels of omega-3 fatty acids compared to salmon. While eggs do contain some omega-3s, the amount is considerably lower than what is found in fatty fish like salmon.

5. Which physiologic role does vitamin C play in the body?

• A. Transcribing DNA to RNA
• B. Absorption and regulation of calcium
• C. Protects integrity of cellular membranes
• D. Catalyst for synthesis of blood-clotting factors

Correct answer: C

Rationale: Vitamin C plays a crucial role in protecting the integrity of cellular membranes. It is essential for collagen synthesis, which is important for wound healing and maintaining skin, blood vessels, and other tissues. Choice A is incorrect as the transcription of DNA to RNA is facilitated by vitamin A. Choice B is incorrect as calcium absorption and regulation are functions of vitamin D. Choice D is incorrect as vitamin K serves as a catalyst for the synthesis of blood-clotting factors, not vitamin C.

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