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22 Cards in this Set
- Front
- Back
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When ATP is spilt the energy moves the myosin head from the flexed position to the extended energized position ready to contract.
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True
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The wave of depolarization spreads to the sarcoplasmic reticulum, this causes the release of
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Calcium
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Ca++ binds to the troponin C site the conformational change moves the troponin molecule exposing the
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Myosin binding site
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The enzyme that breaks down acetylcholine in the synaptic space
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acetocholnecrserale
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The calcium-binding protein located in the sarcoplasmic reticulum
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calsequstrin
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The optimal sarcomere length for the generation of maximum muscle tension.
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2.2 micron
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The amount of tension generated by a muscle depends on
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frequency of stimulation of motor unit length muscle fiber before contraction # and size motor unit involve structural componet of muscle
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The period of a twitch contraction where the is an influx of calcium ions into the sarcoplasm.
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latunct period
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The period of a twitch contraction due to cross bridge activity
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Contraction Period
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The period of a twitch contraction due to active transport of Ca++ back into the sarcoplasmic reticulum.
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relaxation period
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The period of a twitch contraction during which a second stimulus will not generate an action potential
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refactory period
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When a second stimulus from the same motor unit causes a contraction after the refractory period and before relaxation
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Wave summation or temporal summation
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When multiple motor units are stimulated at the same time causes a contraction after the refractory period and before relaxation
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Spatial summation
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When skeletal muscle is stimulated at a rate that allows it to partially relax between stimuli
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incomplete tentanus
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When skeletal muscle is stimulated at a rate that does not allow relation between stimuli
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complete tentonus
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The phenomenon where the strength of a muscle contraction gradually increases to reach its maximum strength of contraction
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Trept or staircassing
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Muscle Tone is when small amount of motor units are always contracted
in a muscle at any given time |
True
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An increase in muscle tone
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Hypertonic
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A decrease or lost muscle tone
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hypotonic
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During an ________ contraction the muscle remains the same length
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Isometric
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During an _________ contraction the muscles lengthens
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eccentric
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During a __________ contraction the muscle becomes shorter.
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concentric
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