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 stored in muscle.
C) produce similar amounts of ATP.
D) rely on reactions within mitochondria.
E) have similar time courses.

Question

Quizplus · Accepted Answer

The three systems (phosphagen, glycolytic, and oxidative) differ in their capacity and rate at which they produce ATP. The phosphagen system produces ATP rapidly but has a limited capacity, the glycolytic system produces ATP more slowly but has a larger capacity than the phosphagen system, and the oxidative system produces ATP slowly but has the largest capacity of the three. Therefore, A is the best answer as it accurately reflects the differences between the three systems.

The Three Systems by Which Muscles Obtain ATP