BIO SCI E109 Chapter Notes - Chapter 11.1-11.3: Immunoglobulin Light Chain, Myosin, Troponin
9 Oct 2016
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Cardiac: forms the heart wall, striated, works in involuntary manner. Smooth: located in the walls of hollow internal structures, like blood vessels airways, stomach, intestines, and uterus, no striations. Muscle function: producing body movement, stabilizing body positions, storing and moving substances within the body, ex) sphincters, generating heat- thermogenesis. Muscles have several important properties: electrical excitability, contractility, extensibility, elasticity. Muscle fibers- muscle cells that skeletal muscles are mainly composed of. **in addition, connective tissue surrounds groups of 10 to 100 or more muscle fibers, separating them into bundles called fascicles. Tendon- connective tissue that attaches the muscle to a bone. The components of a skeletal muscle fiber allow contractions to occur. Tranverse (t) tubules- tiny invaginations of the sarcolemma. Muscle action potentials travel along the sarcolemma and through the t tubules. The sarcoplasm also contains a large amount of glycogen, which is the storage form of glucose that can later be used to synthesize atp.
