ENS 304 Lecture Notes - Lecture 15: Biceps, Myocyte, Elastic Energy
10 Apr 2020
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Document Summary
Module 8a - muscle anatomy & physiology review. Generate force to produce movement (ex: limbs) Provide support within the inelastic components (ex: holding tension) Absorb reactive forces within the elastic component - harness elastic energy. Provide deceleration and stability at / across joints. Located within walls of blood vessels and internal organs. Specialized muscle cells ( myocardium"), plus portions of the great vessels. All interconnected and produce strong, rapid, continuous rhythmic contraction in synchrony. Attached to a skeleton directly or via connective tissue. Muscle fibers are individually insulated to prevent action potentials from spreading other fibers. Produce both tonix (sustained, low-force) or phasic (burst-style, higher-force) contractions. ~100 fibers - tympani in the ear. Fusiform: longer, thinner bellies, with fibers running parallel to length. Pennated: thicker bellies with fibers running diagonally across length. Collagen fibers: strong and inelastic fibers; bind together in cross weave pattern to offer stiffness and rigidity (structural support and stability)
