Question

the \cocking\ of the myosin heads, hydrolysis of atp, and the power stroke occur during the ____ phase of skeletal muscle contraction.
\texcitation - contraction coupling
\tcontraction
\texcitation
\trelaxation

Explanation:

During the contraction phase of skeletal - muscle contraction, myosin heads "cock", ATP is hydrolyzed, and the power stroke occurs. Excitation - contraction coupling is the process that links muscle excitation to contraction. Excitation is the initial electrical stimulation, and relaxation is when the muscle returns to its resting state.

Answer:

B. contraction