Which failure mode becomes likely in human musculoskeletal structure when fibroblast collagen production declines with age, leading to reduced collagen cross-linking within tendons?

💡 Explanation

Tendon rupture becomes more likely with age because reduced collagen production leads to decreased collagen cross-linking, weakening the tendon's tensile strength. Therefore, the tendon is more susceptible to tearing under stress, rather than improving bone density or muscle function.

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