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6 Cards in this Set
- Front
- Back
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Myofibril
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One of hundreds of thousands of cylindrical subunits that make up a skeletal muscle cell
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Myosin
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protein that, along with actin, is the chief component of muscle; makes up the thick filament of a muscle fibre
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Slow-twitch fibre
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muscle fibre that produces most of its energy aerobically; contracts slowly, but can maintain a steady, prolonged production of ATP when oxygen is available
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Fast-twitch fibre
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muscle fibre that produces most of its energy anaerobically; adapted for the rapid generation of power, but dependence on anaerobically produced energy results in vulnerability to accumulation of lactate, causing rapid fatigue
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Actin
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protein that, along with myosin, is the chief component of muscle; makes up the thin filament of a muscle fibre; also a main component of the cellular cytosketeton
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Creatine phosphate
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a high-energy compound that regenerates ATP in muscle cells
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