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← Human Body & HealthAn elderly patient with declining muscle mass undergoes intense aerobic training; which outcome becomes more likely as increased mitochondrial activity occurs?
A)Increased satellite cell proliferation rate
B)Enhanced protein turnover and oxidative stress✓
C)Reduced inflammatory cytokine expression locally
D)Decreased muscle protein breakdown rate
💡 Explanation
Intense aerobic exercise increases mitochondrial respiration to meet energy demands; because this process generates reactive oxygen species, it can overwhelm antioxidant defenses. Therefore, increased oxidative stress occurs, promoting protein turnover rather than muscle growth, while decreased inflammatory cytokines or satellite cell proliferation are not primary effects of this imbalance.
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