The three systems by which muscles obtain ATP
A) differ in the capacity and rate at which they produce ATP.
B) rely on the large amounts of ATP already present in the muscle itself.
C) produce similar amounts of ATP.
D) rely on reactions within mitochondria.
E) have similar time courses.

Question

Quizplus · Accepted Answer

The three systems for muscle ATP production (phosphagen, glycolytic, and oxidative) differ in their capacity and rate at which they produce ATP. The phosphagen system produces ATP quickly but has limited capacity, while the oxidative system produces ATP slowly but has a high capacity. The glycolytic system falls between the two in terms of both capacity and rate of ATP production.

The Three Systems by Which Muscles Obtain ATP