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← Human Body & HealthWhy does bone density decrease in elderly individuals experiencing sarcopenia impact resistance differently from younger individuals?
A)Bone collagen fibers increase rigidity
B)Reduced osteoblast activity impairs repair✓
C)Telomere length causes matrix degradation
D)Elastin fibers increase fracture toughness
💡 Explanation
Reduced osteoblast activity explains decreased bone density and impaired fracture repair because sarcopenia leads to decreased muscle loading, reducing bone stimulation; therefore, bones break more easily rather than bones maintaining equivalent repair capacity under stress.
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