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.
esophagus during peristalsis, (2) is the contraction coordinated in any way with peristaltic contraction of the circular muscle, (3) why does longitudinal muscle contract during esophageal peristalsis, and (4) are there benefits to longitudinal muscle contraction that are of sufficient importance to explain the existence of a longitudinal