During anaerobic metabolism in muscles, lactic acid causes what?

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Study for the Anatomy and Physiology Muscular System Test. Prepare with flashcards and multiple choice questions; each question provides hints and explanations. Get ready to excel in your exam!

Multiple Choice

During anaerobic metabolism in muscles, lactic acid causes what?

Explanation:
During intense exercise when oxygen is limited, muscles rely on glycolysis and convert pyruvate to lactate to regenerate NAD+, allowing ATP production to continue quickly. This process releases hydrogen ions, lowering the muscle’s pH and causing acidosis. The acidic environment irritates nerve endings, producing the burning sensation and pain felt in the muscle. So lactic acid buildup is associated with that pain during high-intensity activity. It doesn’t increase oxygen capacity or directly improve endurance, and its presence is more linked with fatigue than with any fatigue-reducing effect.

During intense exercise when oxygen is limited, muscles rely on glycolysis and convert pyruvate to lactate to regenerate NAD+, allowing ATP production to continue quickly. This process releases hydrogen ions, lowering the muscle’s pH and causing acidosis. The acidic environment irritates nerve endings, producing the burning sensation and pain felt in the muscle. So lactic acid buildup is associated with that pain during high-intensity activity. It doesn’t increase oxygen capacity or directly improve endurance, and its presence is more linked with fatigue than with any fatigue-reducing effect.

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