ANP 1106 Lecture Notes - Lecture 5: Skeletal Muscle, Myocyte, Motor Neuron

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Joanne Savory

Document Summary

Transforms chemical e (atp) to directed mechanical e to exert a force. In walls of hallow organs (e. g. stomach, urinary bladder, and airways) 4 important functions: produce movement, maintain posture and body position, stabilize joints, generate heat- shivering. *** additional functions protects organs, forms valves, controls pupil size*** Each muscle served by an artery, one nerve, and one or more veins. Enter/ exit near central part & branch through ct sheaths. Every skeletal muscle fiber supplied by nerve ending that controls its activity. Huge nutrient & o2 need generates large amount of waste: motor unit: consist of the motor neuron and all muscle fibers (four to several hundred) it supplies. Smaller the fiber number, the greater the fine control. *** muscle has several different levels of ct wrapping *** Epimysium: dense, fibrous ct that surrounds the whole muscle. Perimysium: fibrous ct surrounding fascicles (group of muscle fibres) Endomysium: fine layer of areolar ct that surrounds each muscle fiber (cell)