Physiology 2130 Study Guide - Midterm Guide: Endoplasmic Reticulum, Myofilament, Sarcolemma

• School: Western University
• Department: Physiology
• Course: Physiology 2130
• Professor: Anita Woods

Document Summary

Striated muscle because muscle fibers have a specific binding pattern. Fascicle: whole muscle made of fascicles and each fascicle is made of bundles of muscle fibers (muscle cells) Do not get more muscle cells, the ones you have just get bigger. Sartorius is the longest muscle in the body and its fibers can get up to 12cm long. There are repeating arrays along the length of the muscle cell. Sarcolemma: the surface membrane of the muscle fiber. Transverse (t) tubule: extensions coming off the sarcolemma: hollow tube wrapping around the myofibrils, ap spreads out along the sarcolemma and continues down the t tubule to get deep into muscle cells. Composed of many individual myosin molecules that try and attach onto the actin molecule. Each molecule is made up of 2 long peptide chains, each with an alpha helical tail and a globular head (globular heads extend to the sides, away from the axis, & tails face inward along an axis)