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← Human Body & HealthAs human bone marrow ages, adipocyte density increases, inhibiting hematopoiesis; which mechanism most directly reduces bone density?
A)Increased osteoblast differentiation factors
B)Reduced mechanical loading stimulation✓
C)Enhanced calcitonin receptor sensitivity
D)Elevated vitamin D hydroxylation efficiency
💡 Explanation
Increased marrow adiposity reduces the space available for hematopoietic cells, resulting in fewer osteoblasts being produced; therefore reduced mechanical loading stimulation from active bone remodeling leads to decreased bone density, rather than enhanced bone formation.
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