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chapter 9

  1.  
    what are the two things muscle contractions depend on?
  2.  
    the ability to receive and respond to stimuli
  3.  
    the ability to shorten forcibly
  4.  
    the ability to recoil and resume the original resting length
  5.  
    what maintains posture, stabilize joints, and generates heat?
  6.  
    densely packed, rodlike contractile elements
  7.  
    the smallest contractile unit of a muscle
Answer Key
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chapter 9 (Answer Key)

  1.  
    what are the two things muscle contractions depend on?
    actin ; myosin
  2.  
    the ability to receive and respond to stimuli
    Excitability
  3.  
    the ability to shorten forcibly
    contractility
  4.  
    the ability to recoil and resume the original resting length
    elasticity
  5.  
    what maintains posture, stabilize joints, and generates heat?
  6.  
    densely packed, rodlike contractile elements
    myofibrils
  7.  
    the smallest contractile unit of a muscle
    sarcomere

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