Exam II Review (10-19)

Exam II Review (10-19) - Lecture 10 Muscle I Skeletal...

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Lecture 10: Muscle I – Skeletal Muscle Basic Info Muscles make up 40-50% of total body weight MOVEMENT POSTURE Different Types Skeletal : striated, voluntary; mostly limb movements Cardiac : striated, involuntary; heart movements Smooth : non-striated, involuntary; movements of hollow organs (bladder, blood vessels, intestines,  etc.) Powered by ATP E source = ATP, sometimes fatty acids Skeletal Muscle Functions o o Stretch when an opposing muscle contracts o Return to their original length after stretching – elastic o Contract when stimulated by a motor neuron Contains o Nerves o Blood vessels o Connective tissue o Muscle cells (= myofibers) Muscle Cells o Bundled into  fascicles : bundles of muscle fibers o Packed with myofibrils o
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Exam II Review (10-19) - Lecture 10 Muscle I Skeletal...

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