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19 Cards in this Set
- Front
- Back
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epimysium |
surrounds entire muscle |
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endomysium |
surrounds each muscle fiber |
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perimysium |
surrounds each muscle bundle (fascicle) |
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deep fascia |
binds muscles to other muscles |
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sarcolemma |
plasma membrane of skeletal muscle fiber |
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sarcoplasm |
cytoplasm of a skeletal muscle fiber |
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sarcoplasmic reticulum |
elaborate smooth endoplasmic reticulum tubules that run longitudinally along the myofibrils and surround each myofibril |
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myofibril |
rodlike contractile elements within a muscle fiber containing myofilaments |
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sarcomere |
functional unit of a skeletal muscle fiber |
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A band |
area of the sarcomere with overlapping thick and thin filaments |
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I band |
area of the sarcomere containing only thin filaments |
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H band |
area in the center of the A band containing only thick filaments |
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cross bridges |
myosin heads |
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axon terminal |
contains vesicles filled with acetylcholine |
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synaptic cleft |
space between the neuron and the muscle membrane |
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sarcolemma of neuromuscular junction |
contains receptors for acetylcholine |
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twitch |
type of contraction represented by a single stimulus/contraction/relaxation sequence |
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unfused or incomplete tetanus |
Produces sustained but quivering contraction that results in maximum tension |
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fused or complete tetanus |
a muscle that is stimulated so frequently that the relaxation phase is completely eliminated and smooth, sustained contraction results |
