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Movement of Muscle, Skeleton Muscle (640), Motor unit, Cardiac muscle,…
Movement of Muscle
Sacromere
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when muscles are resting, actin and myosin are not touching each other but they want to
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Skeleton Muscle (640)
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Myofibril
Tiny, parallel threads squish
together to form muscle
Muscle fiber
actual muscle cells with mitochondria,multiple nuclei and sarcolemma
Fascicle
larger, string-like bundles which combine to form the larger rope-like muscle organ
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mostly voluntary, active them with somatic nervous system
Motor unit
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In a big power-generating muscle, each of a thousand motor neurons may synapse with and innervate a thousand muscle fibers
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Things to remember
Muscles never push, they always pull
Whatever one muscle does, another can undo
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