<prompt> Latent period of muscle twitch is 10 s, contraction period is 40 s and the relaxation time is 50 s. Tetanising frequency would be:25 Hz50 Hz75 Hz100 Hz  <response>: For tetanus to occur, stimulus must fall repeatedly in the contraction phase that will cause the accumulation of Ca in myoplasm leading to sustained contraction. Tetanising frequency 1 time of contraction phase 140 25 Hz 