Sliding Filament Hypothesis
Updated: 5/19/2020
Sliding Filament Hypothesis
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Storyboard Text

  • Hey Ronald, how do muscle contractions work?
  • Oh it's very simple, Edward. So there is myosin, or thick filaments, and actin, or thin filament.
  • wow that is amazing
  • ATP attaches to the myosin heads, causing the ATP to split into phosphates and ADP.
  • Then, the myosin heads can bind to actin, forming crossbridges.
  • that is so interesting!
  • After that, the ADP is released and the myosin heads pull the actin filaments, causing the muscle fibers to contract.
  • Finally, the myosin head binds to a new ATP, causing the crossbridge to detach. The cycle starts over from here, allowing the myosin to attach farther and farther along.
  • Wow thank you Ronald that is so cool.
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