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← Human Body & HealthWhy does bone mineral density increase with weight-bearing exercise, rather than decrease?
A)Reduces osteoclast mineral resorption activity
B)Increases phosphorus excretion rate
C)Lowers parathyroid hormone secretion
D)Stimulates osteoblast bone mineral deposition✓
💡 Explanation
Weight-bearing exercise stimulates bone formation because mechanical stress activates osteoblasts, which then deposit more bone mineral, thereby increasing bone density. Therefore, mineral deposition increases, rather than a reduction in mineral breakdown or hormonal shifts affecting mineral balance.
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