The Molecule That Rapidly Replenishes ATP at the Beginning of Muscle

Question

The molecule that rapidly replenishes ATP at the beginning of muscle activity is
A) actin.
B) creatine phosphate.
C) dystrophin.
D) acetylcholine.
E) myosin.

Accepted Answer

Creatine phosphate is a high-energy molecule that can rapidly donate a phosphate group to ADP to form ATP, providing a quick source of energy for muscle contraction at the onset of activity.