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← Human Body & HealthWhy does decreased bone density (osteoporosis) increase fracture risk, compared to healthy bone?
A)Altered collagen fiber alignment occurs
B)Reduced bone mass increases porosity✓
C)Increased osteoblast activity compensates fully
D)Cortical bone thickness remains constant
💡 Explanation
Reduced bone density in osteoporosis leads to increased porosity and decreased trabecular thickness, which weakens the bone's structural integrity and fracture resistance because the overall bone mass is lower. Therefore, fractures are more likely with minimal trauma, rather than increased strength, constant thickness, or altered collagen alignment.
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