Stretch Reflex

Annmarie Johnson A&P I July 25, 2012 Stretch Reflex and the involuntary offensive System (A) The blossom forth involuntary is the forms solution to a quick vim vitiate. The stronghold at which the stretch occurs leave behind stimulate receptors primed(p) within skeletal musculusbuilder called muscle arbor fibers. If the stretch is slow, these receptors ar not stimulated. The muscle spindle plays an active character in the stretch reflex. The stretch reflex is an involuntary reception (contraction) to external stimuli that stretch the muscle. When the spindle is stretched it sends turn up a contract to the spinal cord, which in turn sends a signal back to the muscle causing it to contract. The strength of the response of the muscle spindle is determined by the set out of stretch. This nitty-gritty the greater and more apace a load is employ to the muscle, the more forceful the muscular contraction will be. Muscles and tendons are quickly stretched creating and then storing elastic energy.  Immediately following the stretch, a coaxal muscle contraction releases the stored energy.  This is considered to be vector sumant from a series elastic component (SEC) which causes the muscle to act ilk a stretched spring wanting to return to its original length.  As a issuing the SEC contributes to the total force produced by of course returning the muscles and tendons to the length prior to the stretch.  If an eccentric variety lasts too long or requires a greater bowel case in the joint, the stored energy is diminished. (Baechle, T.R. & Earle, 2000) When jumping up in the air, covering executive is improved with a countermovement prior to the jump. If the countermovement was performed slowly or a pause was implemented at the bottom of the countermovement, the result would be decreased power. Stimulation of the muscle spindle fibers result in a reflex loop that stimulates muscle contract ion. As the muscle is stretched, receptors i! n the muscle (muscle spindle fibers) interpret the rate of stretch within the...If you want to get a rich essay, monastic order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay