And because there are more people doing it part time, where they donât need to make much of a profit in order to pay their bills, itâs going to be harder and harder for people in the industry who do rely upon photography to pay their bills to do so.
The contraction period, or contraction. time, is the time it takes the muscle to. reach its peak contraction after the latent. period. The relaxation period is the time. the muscle takes to return to resting. tension after reaching its peak. contraction. Muscles rely on two physiological. principles to bring about productive. motion: recruitment and summation.
both actin and myosin are involved in muscle contraction and relaxation and they make up 90 % of muscle protein the overall process is initiated by an external signal typically through an action potential stimulating the muscle which contains specialized cells whose interiors are rich in actin and myosin filaments