ANP 1105 Study Guide - Midterm Guide: Sarcolemma, Troponin

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Linda Parker

Document Summary

Types of muscle: smooth involuntary muscles, cardiac controlled by the autonomic nervous system, most skeletal muscles contain numerous elongated cells (muscle fibers) that generate contractile force using energy from atp hydrolysis, within muscle fibers are myofibrils that contain the contractile machinery, the sarcoplasmic reticulum surrounds the myofibrils, stores calcium ions and is closely associated with transverse tubules, which penetrate into the cell interior from the sarcolemma, skeletal and cardiac muscles are striated, reflecting the orderly arrangement of thick and thin filaments in the myofibrils , which are made up of fundamental force generating units that are joined in an end to end fashion, thick and thin filaments contain the contractile proteins myosin and actin, the heads (cross bridges) of myosin molecules are responsible for generating the motion that drives contraction and posses two important sites, an actin binding site, atpase site terminate contractions, troponin and tropomyosin present on the thin filament serve to initiate or.