ATP is supplied to your muscles through several systems.As you exercise, where does the ATP you use come from, in order from most accessible to most slowly produced?

Question

Quizplus · Accepted Answer

The most immediately accessible source of ATP is stored ATP and creatine phosphate. This can be used for short bursts of activity. As this is depleted, the next source is glycolysis in the cytoplasm, which is a quicker way to produce ATP than oxidative metabolism in the mitochondria. However, glycolysis produces ATP at a slower rate than stored ATP and creatine phosphate. Finally, as exercise continues, the body switches to oxidative metabolism in the mitochondria, which produces ATP more slowly, but can sustain ATP production for a longer period of time.

ATP Is Supplied to Your Muscles Through Several Systems