ANP 1106 Chapter Notes - Chapter 9: Dense Irregular Connective Tissue, Semispinalis Muscles, Epicranial Aponeurosis
21 Mar 2016
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Transforms chemical energy (atp) to directed mechanical energy > exerts force. Myo, mys, and sarco all refer to muscle. Excitability: the ability of a cell to receive and respond to a stimulus. Contractibility: the ability to shorten forcibly when adequately stimulated. Extensibility: the ability to extend or stretch. Elasticity: the ability of a muscle cell to recoil and resume its resting length after stretching. Skeletal muscle bres predominate, but blood vessels, nerve bres, and substantial amounts of connective tissue are also present. In general, one nerve, one artery, and one or more veins serve each muscle. These structures all enter or exit near the central part of the muscle and branch profusely through ct sheaths. Huge nutrient and oxygen need; generates large amount of waste. Motor unit: consists of the motor neuron and all muscle bres it supplies, the smaller the bre number, the greater the ne control.
