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microscopic anatomy of skeletal muscle

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show a reservoir of calcium ions; it has gated channels in its membranes that allow a flood of calcium ion into the cytosol where it activates muscle contraction.  
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show triad  
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show Myosin and actin are called contractile proteins because they accomplish the shortening of the muscle fiber  
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show Tropomyosin and troponin are called regulatory proteins because they act like a switch to determine when the fiber can contract or not contract  
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show calcium ions  
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show an enormous protein located between the sarcolemma and the outermost myofilaments; it links actin filaments to a peripheral protein on the inner face of the sarcolemma.  
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show Dark bands that consist of thick filaments lying side by side that partly overlap the thin filaments  
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H band   show
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M line   show
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I band   show
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Z disc (Z line)   show
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