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ATP is used to detach myosin heads and move them back to position for another "power stroke."
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∙ 11y agoAtp
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When does the myosin head cock back to store energy for the next cycle?
After the myosin head detaches, energy from ATP hydrolysis is used to re-cock the myosin head.
Does myosin have the ability to swivel when powered by ATP?
Yes...ATP causes myosin to detach from actin. Then, Hydrolysis of ATP, which results in ADP and P, causes conformational change in myosin head to swivel or pivot about its axis and then weakly bind to an actin filament. Once the myosin head binds, a conformational change in the myosin head will cause the P to leave (the ADP is still stuck on). The leaving of the P causes the power stroke or "the pulling of the actin filament/rowing stroke". ADP then leaves and the myosin is now back at its original state.
What makes rigormortis cease after 72 hours?
The myosin heads detach from actin, allowing the muscles to relax; prior to rigor mortis, Directly after death ATP is not produced therefore, Ca +2 is absent within the myosin binding sites on the actin, which leads to the myosin heads not being able to detach from actin, this condition doesnt allow the muscle to relax, aka rigor mortis. For the muscle to relax or for rigor mortis to cease the myosin heads detach from actin.
What substances causes the myosin head to change shape?
The myosin head changes shape mid-reaction, when the energy released by hydrolysis of ATP is absorbed by the myosin head.
What acts as ATPase during the contraction cycle of muscle?
myosin cross-bridges
What immediately follows the binding of ATP to the myosin head?
The myosin head pivots, moving the actin strand.
When was Detach Me from My Head created?
Detach Me from My Head was created on 2010-09-28.
Which molecule binds to the myosin head in order to break the actin-myosin bond?
ATP
What does the release of ADP and P from the myosin head cause?
The release of ADP and P from the myosin heads causes the myosin heads to change shape.
What is a myofilament with a knob like head?
Myosin
What is the myofilament with a knob like head?
Myosin
What is made of myosin?
Most myosin molecules are composed of both a head and a tail domain.
