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← Human Body & HealthWhy does skeletal fragility increase post-menopause even with adequate dietary calcium?
A)Renal calcium reabsorption sharply increases
B)Osteoblast activity becomes greatly enhanced
C)Calcitonin secretion rates significantly increase
D)Estrogen's bone-protective effect diminishes✓
💡 Explanation
Post-menopause, estrogen levels decline, reducing osteoblast stimulation and increasing osteoclast activity; this leads to a decrease in bone mineral density because estrogen's bone-protective effects are diminished, therefore skeletal fragility increases, rather than being countered by increased calcium reabsorption or calcitonin.
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