BIO 167 Lecture Notes - Lecture 9: Peptide, Aponeurosis, Blood Vessel
26 Apr 2021
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Document Summary
Myo-, mys- (prefixes for muscle) & sarco- (flesh) Transforms chemical energy (atp) into directed mechanical energy exerts force. Organs attached to bones and skin (skeletal muscles) Skeletal muscle fibers are longest muscle cells. Only found in heart; bulk of walls. Calls are elongated, but has no striations. Ability to receive and respond to stimuli. Ability to shorten forcibly when adequately stimulated. Ability to recoil and resume resting length after stretching. Each muscle served by one artery, one nerve, & one or more veins. Enter/exit near central part and branch through connective tissue sheaths. Very skeletal muscle fiber supplied with a nerve ending. Huge nutrient (energy) need; generates large amounts of waste. Connective tissue sheaths: support each cell, reinforce and hold muscle together. Dense irregular ct surrounding the whole muscle. Dense irregular ct surrounding a fascicle (group of muscle fibers) Wispy sheath of areolar ct surrounding each muscle fiber. Origin immovable or less movable attachment.
