Sliding Filament Hypothesis
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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.