Question

detachment of myosin cross - bridges occurs during the
contraction phase.
relaxation phase.
isotonic period.
stimulus phase.
latent period.

Explanation:

During muscle relaxation, the myosin - actin cross - bridges detach. ATP binds to myosin, causing it to detach from actin. In the contraction phase, cross - bridges form and pull on actin. The isotonic period is related to muscle movement with load. The stimulus phase is when the muscle is first activated, and the latent period is the time between stimulus and contraction start.

Answer:

B. relaxation phase