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Human Body & Health

Why does an elderly individual's muscle tissue exhibit reduced force generation compared to a younger person, even when stimulated with the same electrical signal?

A)Increased mitochondrial oxidative phosphorylation efficiency
B)Enhanced acetylcholine receptor sensitivity at synapses
C)Decreased excitation-contraction coupling efficiency due to aging
D)Elevated calcium reuptake rate into sarcoplasmic reticulum

💡 Explanation

Reduced force generation in elderly muscle tissue results from decreased excitation-contraction coupling efficiency because this mechanism is impaired during aging, leading to reduced calcium release and actin-myosin interaction. Therefore, force generation is diminished, rather than being caused by improved mitochondrial function or enhanced receptor sensitivity.

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