Which of the following must occur for muscles to recover from fatigue?
A) ATP is produced via aerobic respiration.
B) Lactic acid builds up in the sarcolemma of muscle cells.
C) Muscle cells start to make ATP in anaerobic conditions.
D) Lactic acid is metabolized to pyruvate or glucose and ATP reserves are restored.

Question

Quizplus · Accepted Answer

Lactic acid buildup in muscles can cause fatigue, but for muscles to recover from this fatigue, lactic acid must be metabolized to pyruvate or glucose, and ATP reserves must be restored. This process can occur via aerobic respiration (choice A) or anaerobic respiration (choice C), but choice D encompasses both possibilities and accurately reflects the mechanism of muscle recovery.

Which of the Following Must Occur for Muscles to Recover