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2. myosin, with a ADP molecule attached, then reattaches to

  • actin
  • troponin
  • tropomyosin

3. the ADP molecule on the myosin allows what to be formed

  • cross bridge
  • action potential
  • muscle contraction

4. once attached to actin, myosin head changes shape and what is released

  • calcium ions
  • ADP
  • Pi

5. the hydrolysis of ATP provides energy for

  • myosin to return to its original position
  • actin to return to its original position
  • tropomyosin to return to its original position

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