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Muscle Fiber Contraction and Calcium

  1. Oct 1, 2008 #1
    When glycerinated rabbit muscle fiber was placed in 10^-4 M of CaCl2 solution, the percent change in length of the muscle fiber was around 93%.

    When glycerinated rabbit muscle fiber was placed in 30 mM ATP in 10^-2 M CaCl2 + 0.05 M KCl + 0.001 M MgCl2 solution, the percent change in length of the muscle fiber was around 51%.

    Why does the first trial (with just the calcium ions) experience a greater contraction than the second solution with both ATP and calcium ions?

    Thank you for any replies.
     
  2. jcsd
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