Question

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

Explanation:

During muscle relaxation, the myosin cross - bridges detach from actin. In the contraction phase, cross - bridges attach and generate force. The latent period is the time between stimulus and contraction. The stimulus phase is about the nerve impulse. The isotonic period is related to muscle shortening with load.

Answer:

relaxation phase.