Question

When muscles begin converting glucose into lactic acid?

• A. Muscles run out of oxygen
• B. Accumulation of creatine in the muscles
• C. Muscle collapse
• D. All the above

Answer 1

The correct option is A Muscles run out of oxygen

• When you exercise, your muscles move more vigorously than when you are at rest. Their metabolic rate increases.
• They need more energy, so they produce more of the chemical energy molecule ATP.
• Your muscles begin converting glucose into lactic acid instead of energy when anaerobic exercise takes over, power output drops and fatigue sets in. Hence, when Muscles run out of oxygen muscles begin converting glucose into lactic acid.

So, the correct answer is 'Muscles run out of oxygen'.