Q:

What is the role of Ca ++ in muscle contraction

saraalalwane
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2022-09-20
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What is the role of Ca ++ in muscle contraction?

  1. Ca causes an action potential to travel along the sarcolemma
  2. Ca binds to troponin changing its shape
  3. Ca attaches to the binding site of myosin, energising it.
  4. Ca engages with the binding site of actin causing the power stroke
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saraalalwane
2022-09-20
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B: the myosin head cannot attach to actin until its binding site is exposed. Ca causes this to happen.

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