Physiology 2130 Lecture Notes - Lecture 5: Sliding Filament Theory, Myofibril, Myosin
8 Dec 2016
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Learning objectives: describe the structural components of skeletal muscle, including muscle fibers, myofibrils, myofilaments, sarcomere, and the arrangement of the thin and thick myofilaments. The whole muscle is composed of groups of fasciculi surrounded by a white. Each fascicle is made up of bundles of. Within each cell there are cylindrical bundles of myofibrils. Composed of two types of myofilaments, which are the contractile elements. Groups of thin myofilaments and groups of thick myofilaments are arranged. In a repeating patter (thick, thin, thick, thin, etc. ) Myofibril from one end of the muscle to another. Myofilaments extends outward in opposite directions from a central z disk, A central m line where they are attached. Length of the myofibril and the muscle cell. This is the smallest functional contractile unit of the. The regions that contain thick filaments appear as dark bands. Called a bands, and the regions that contain only thin appear lighter and are i.
