CSCS ch.2

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bcb2127
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191888
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CSCS ch.2
Updated:
2013-01-09 08:51:12
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CSCS
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CSCS ch.2
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  1. ________: chemical that diffuses across the nmj, causing excitation of the sarcolemma
    acetylcholine
  2. ____-__-_____: all of the fibers in a muscle fire at once. there is no such thing as a motor neuron stimulus that causes some muscle fibers to contract.
    all-or-none principle
  3. _____ fibers: normal muscle fibers
    extrafusal
  4. ____ twitch muscle fibers: motor unit that develops force rapidly, also relaxes rapidly and thus has a short twitch time
    fast
  5. ____ of ____: method of grading muscle force that uses how frequently a muscle is activated
    frequency of activation
  6. ____ ____ ____: proprioceptors located in tendons near the myotendinous junction and are in a series, that is attached end to end with extrafusal muscle fibers
    golgi tendon organ
  7. ______- enlargement of muscle fibers
    hypertrophy
  8. _____ fibers: modified fibers enclosed in a sheath of connective tissue and run parallel to normal muscle fibers
    intrafusal
  9. _____ sense: conscious appreciation of the body in three dimensional space
    kinesthetic sense
  10. ____ ____: a motor neuron and all the muscle fibers that it innervates; basic functional entity of muscular activity.
    motor unit
  11. _____ ____: proprioceptors that consist of several modified muscle fibers enclosed in a sheath of connective tissue.
    muscle spindle
  12. ______: specialized sensory receptors located withing joints, muscles, and tendons
    proprioceptors
  13. ______: means of achieving an increase in force by varying the number of motor units activated
    recruitment
  14. ____-____ fiber: develop force slowly and relax slowly, and have a long twitch time
    slow twitch
  15. _____: max amount of force the motor unit can develop
    tetanus
  16. ____: short period of activation of muscle fibers within the motor unit
    twitch

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