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After teaching a group of students about changes in body weight due to aging, the instructor determines that the students have understood the teaching when they state which of the following?

A.

Thinning of the vertebral discs leads to weight loss.

B.

An increase in lean body mass leads to weight gain.

C.

Spinal kyphosis contributes to the increase in body weight.

D.

Loss of muscle tissue contributes to the decrease in weight.

Answer and Explanation

The Correct Answer is D

A. Thinning of the vertebral discs leads to a decrease in height, not weight.  
B. Lean body mass actually decreases with aging, contributing to weight loss rather than gain.  
C. Spinal kyphosis affects posture but does not significantly contribute to changes in body weight.  
D. Loss of muscle tissue (sarcopenia) is correct because aging leads to a decline in muscle mass, which contributes to weight loss. Additionally, a slower metabolism and reduced physical activity further affect body composition.


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Related Questions

Correct Answer is A

Explanation

A. Oral mucosa is correct. Central cyanosis occurs when oxygen saturation is significantly reduced and is best assessed in areas with rich vascular supply, such as the oral mucosa, lips, and tongue.
B. Palms are incorrect because peripheral cyanosis (often due to cold exposure or poor circulation) can cause blue-tinged extremities, but this does not indicate central cyanosis.
C. Sclera is incorrect because cyanosis does not affect the sclera; however, jaundice does.
D. Nail beds are incorrect because, like the palms, they are more indicative of peripheral cyanosis, which can result from localized poor perfusion rather than central oxygenation problems.

Correct Answer is D

Explanation

A. Thinning of the vertebral discs leads to a decrease in height, not weight.
B. Lean body mass actually decreases with aging, contributing to weight loss rather than gain.
C. Spinal kyphosis affects posture but does not significantly contribute to changes in body weight.
D. Loss of muscle tissue (sarcopenia) is correct because aging leads to a decline in muscle mass, which contributes to weight loss. Additionally, a slower metabolism and reduced physical activity further affect body composition.

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