What Event Results from the Hydrolysis of ATP to ADP

Question

What event results from the hydrolysis of ATP to ADP by the myosin head?
A)cross-bridge formation
B)shortening of the muscle fiber
C)cocking of myosin head to its high-energy position
D)the power stroke

Accepted Answer

The hydrolysis of ATP by the myosin head allows it to cock into its high-energy position, preparing it for the power stroke. Therefore, choice C is the correct answer. The other events listed (cross-bridge formation and shortening of muscle fiber) require other steps in the muscle contraction process to occur.