bio chpt 9

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Author:
lcunrod7
ID:
247902
Filename:
bio chpt 9
Updated:
2013-11-19 19:09:44
Tags:
tension muscle
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study
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  1. what is a a single stimulus-contraction- relaxation sequence in a muscle fiber
    muscle twitch
  2. depending on what factors can a muscle twitch vary
    type, location, internal and external conditions, and other factors
  3. what can be viewed on a myogram
    muscle twitch
  4. what are the three phases of a muscle twitch
    latent period, contraction period, relaxation period
  5. what twitch phase has action potential that sweeps across sarcolemma
    latent period
  6. what twitch phase has SR release of calcium ions
    latent peirod
  7. what twitch phase has contraction cycle has not begun
    latent period
  8. what twitch phase has tension rises to peak
    contraction phase
  9. what twitch phase has calcium binds to troponin allowing cross-bridge formation between myosin head and active site on actin
    contraction phase
  10. what twitch phase has calcium levels fall
    relaxation phase
  11. what twitch phase has active sites covered by tropomyosin
    relaxation phase
  12. what twitch phase has number of cross-bridges decline with detachment
    relaxation phase
  13. What are the two factors determining the amount of tension produced by a skeletal muscle
    the amount of tension produced by each muscle fiber, and total number of muscle fibers stimulated
  14. what effects of stimulation frequency on tension stimulate of skeletal muscle fiber immediately after relaxation phase produces increasing maximum tension
    treppe
  15. what effects of stimulation frequency on tension continues for the first 30-50 stiumulations
    treppe
  16. what effects of stimulation frequency on tension is in most skeletal muscles do not demonstrate this
    treppe
  17. what effects of stimulation frequency on tension is a stiumulation of skeletal muscle fibers before relaxation phase completion produces increasing maximum tension
    wave summation
  18. what effects of stimulation frequency on tension have duration of twitch determines maximum time avaliable to produce this
    wave summation
  19. what effects of stimulation frequency on tension is convulsive tension and wave summation producing almost peak tension
    incomplete tetanus
  20. what effects of stimulation frequency on tension  has wave summation where stimulation frequency eliminates relaxation phase and produces peak tension
    complete tetanus
  21. what effects of stimulation frequency on tension seldomly occurs in normal functioning muscles
    complete tetanus
  22. what is a group of muscle fibers called
    motor unit
  23. the size of this varies with muscle control
    motor unit
  24. what motor unit has movements begin with the smallest motor units
    recruitment
  25. what motor unit as movement continues, more and larger motor units are stimulated to contribute producing greater tension
    recruitment
  26. what motor unit is activated on a rotating basis to maintain a sustained contraction
    Asynchronous motor unit summation
  27. what motor unit has variable number of motor units always active to produce low level tension
    muscle tone
  28. what motor unit is regulated at subconscious level
    muscle tone
  29. what motor unit activated muscle fibers use energy and therefore can affect metabolism by a small amount
    muscle tone

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