Most of the ATP supplies for a skeletal muscle undergoing one hour of sustained exercise come from ________.
A) creatine phosphate
B) glycolysis
C) substrate phosphorylation
D) oxidative phosphorylation

Question

Quizplus · Accepted Answer

During sustained exercise, the body relies on oxidative phosphorylation to produce ATP, which is the most efficient pathway for ATP production. Glycolysis and creatine phosphate contribute to ATP production during short bursts of high-intensity exercise, but they are not sustainable for prolonged periods. Substrate phosphorylation is not a significant source of ATP production in skeletal muscle during exercise.

Most of the ATP Supplies for a Skeletal Muscle Undergoing