the muscle layer on the outside of the intestinal wall is called the
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PN Nutrition Assessment ATI

1. What is the muscle layer on the outside of the intestinal wall called?

Correct answer: A

Rationale: The correct answer is A: serosa. The serosa is the outermost layer of the intestinal wall, providing a protective covering. Choice B, mucosa, is the innermost layer responsible for absorption. Choice C, submucosa, lies beneath the mucosa and contains blood vessels and nerves. Choice D, muscularis mucosae, is a smooth muscle layer located within the mucosa, helping to create folds in the intestinal lining to increase surface area for absorption.

2. Exchange Lists for Meal Planning was devised by the American Dietetic Association in collaboration with which organization?

Correct answer: B

Rationale: The correct answer is B: the American Diabetes Association. The American Dietetic Association collaborated with the American Diabetes Association to devise the Exchange Lists for Meal Planning. This collaboration aimed to assist individuals, especially those with diabetes, in planning balanced meals. Choices A, C, and D are incorrect as they were not involved in the development of the Exchange Lists.

3. Why is it important to understand standard serving sizes of foods?

Correct answer: C

Rationale: The correct answer is C. Understanding serving sizes is crucial because most people have difficulty estimating the amount of food they eat. It helps individuals accurately track their intake, which is essential for maintaining a healthy diet and avoiding overeating. Choice A is incorrect because the question focuses on portion sizes rather than specific nutrients. Choice B is incorrect as it presents an unsupported claim about serving sizes decreasing. Choice D is incorrect as weighing food portions is not always necessary to check serving sizes; understanding standard serving sizes allows for a more practical approach to portion control.

4. Signs of malnutrition can appear when:

Correct answer: A

Rationale: The correct answer is A: 'nutrient reserves are depleted.' Signs of malnutrition manifest when the body's reserves of essential nutrients are exhausted and can no longer sustain health. Choice B is incorrect because excessive nutrient intake exceeding daily needs does not lead to malnutrition but may cause other health issues. Choice C is incorrect as restricting energy intake may lead to weight loss but not necessarily malnutrition. Choice D is also incorrect as increasing caloric expenditure does not directly cause malnutrition.

5. In addition to calcium, the major minerals needed to build and maintain bone tissue include:

Correct answer: C

Rationale: The correct answer is C: phosphorus. Phosphorus, along with calcium, is essential for bone health and maintenance. Potassium (choice A) is important for muscle function, iron (choice B) is crucial for red blood cell production, and fluoride (choice D) helps prevent tooth decay but is not a major mineral needed for bone tissue.

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