Muscle Contractions


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  • Hey! I'm a myosin filament! I know, weird name. But I help your muscles contract. Let me walk you through this. 
  • Myosin
  • I really want to attach to the Actin.... but  my only problem is that this Tropomyosin is in the way! Hmmmm. I think i know how to make it move!!!!
  • tropomyosin
  • Actin
  • Myosin
  •  Oh yes!!! Calcium!! It will allow the Tropomyosin to move so i can get to the actin!!! this will create a crossbridge...
  • Actin
  • Myosin
  • I am no the only one doing this though several other myosin heads are helping to do this!
  • I then pull the actin. this causes a power stroke
  • Actin
  • Myosin
  • Anatomy Katherine Henneforth Muscle Contraction 
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