When a person is performing intense physical exercise and begins to feel fatigue and a burning pain in the muscles, the response of the muscles is to synthesize more of which of the following compounds?

Question

Quizplus · Accepted Answer

When muscles undergo intense physical exercise, they rely heavily on anaerobic respiration, which uses glucose as a fuel source and produces lactate as a byproduct. As lactate accumulates in the muscles, it causes a burning pain and fatigue sensation. However, the muscles respond by synthesizing more lactate, which serves as an important energy source during high-intensity exercise. Glucose and fatty acids can also be used as fuel sources, but lactate synthesis is the primary response to muscle fatigue and burning. Citric acid is not directly involved in muscle contraction or energy production but plays a central role in the aerobic respiration process that occurs after the exercise is complete.

When a Person Is Performing Intense Physical Exercise and Begins