Anatomy and Cell Biology 2221 Lecture 3: Week 3
9 Dec 2016
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Week 3 muscles and the spine and thorax. Accounts for 40-50% of total body mass. Storing and moving substances contract an ap damaged. Electrical excitability muscle and nerve cells (ap) electrical current will. Contractility ability of a muscle to contract forcefully when stimulated by. Extensibility ability to stretch without being. Elasticity ability to return to its original. A skeletal muscle bundle consists of a body, connected by tendons to the skeleton. Connective tissue in muscle: endomysium surrounds muscle fibers (thin, perimysium dense irregular covering fascicles, epimysium dense irregular covering of muscle length and shape. Tendons muscle fiber is a single cell with 100+ nuclei. Muscle fiber arises from the fusion of 100+ cells of myoblasts, hence, each. Hypertrophy is due to an increased production of myofibrils, mitochondria, Hypertrophy enlargement of existing muscle fibers. Hyperplasma increase in number of fibers. Satellite cells retain capacity to fuse with each other or damaged fiber to.
