BIOL 205 Lecture Notes - Lecture 16: Sliding Filament Theory, Shoulder Joint, Sarcomere
Document Summary
Person is unable to abduct humerus axillary n. Person cannot adduct wrist joints when bumping volleyball radial n. and ulnar n. Contractility (composed of a high concentration of contractile proteins) Elasticity (it can return to its original shape) Extensibility (it can stretch, especially in response to antagonist muscles) Temperature regulation (ex: shivering when we are cold) Storage and movement of materials (smooth muscles moving contents in digestive, urinary, birth) Gross anatomy of skeletal muscle o o o o. Antagonist - action opposes those of the agonist. Synergist - assists the prime mover in performing its action. contributes to tension exerted close to the insertion of the muscle prevents movement at a joint, thereby stabilizing the origin of the agonist = fixator. Muscle fibers = muscle cells contain myofibrils composed of myofilaments: actin, myosin. Perimysium (surrounds each fascicle) blood vessels and nerves. Myofibril: a single muscle cell is made up of clusters of myofibril.
