KINE 1P90 Lecture Notes - Lecture 3: Skeletal Muscle, Myocyte, Epimysium
Document Summary
Muscles comprise the largest group of tissues in the body. Three types of muscle: skeletal muscle: make up the muscular system, cardiac muscle: only found in the heart, smooth muscle: appears throughout the body systems as components of hollow organs and tubes. Origin: muscle attachment to the bone at the stationary end (head, tends to be more proximal. Insertion: bony attachment at the more mobile end, tends to be more distal. Belly: thicker middle region of the muscle. Prime mover (agonist: muscle that produces most of the force for a given movement. Antagonist muscles: muscles that produce opposite movements, for every movement, there is an antagonist. Synergistic muscles: muscles that work together to produce the same movement. Muscle consists of a number of muscle fibres lying parallel to one another and held together by connective tissue. Single skeletal muscle cell is known as a muscle fiber: multinucleated, large, elongated and cylindrically shaped, fibres usually extend entire length of the muscle.