ANP 1105 Chapter Notes - Chapter 9: Motor Neuron, Motor Unit, Cytosol

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Jacqueline Carnegie

Document Summary

Skeletal and smooth muscle cells are called muscle fibers (but not cardiac muscles) Characteristics of muscle tissue: excitability, contractility, extensiblilty, elasticity. Functions of muscle tissue: produce movement, maintain posture and body position, stabilize joints, generate heat. A skeletal muscle is made up of muscle fibers, nerves, blood vessels, and connective tissues. Usually, one nerve, one artery, and one or more bveins serve each muscle. Skeletal muscle has a rich blood supply as contracting muscle fibers requires a lor od energy, nutrients, and oxygen. Epimysium: an overcoat of dense, irregular, ct surrounding the whole muscle; sometimes it lies between neighbouring muscles. Perimysium and fascicles: muscle fibers are grouped into fascicles and surrounding each one a layer of dense, irregular, ct called perimysium. Endomysium: a wispy sheath of ct that surrounds each individual muscle fiber consisying of fine areolar ct. When muscle fibers contract, they pull on these sheaths, which transmit the pulling force to the bone to be moved.