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Which event causes cross bridge detachment?

The binding of ATP to the myosin head causes cross bridge detachment by disrupting the binding between myosin and actin. ATP provides the energy necessary for myosin to release from actin and reset for the next contraction cycle.


What is needed to attach and detach myosin heads from actin?

For attachment of myosin heads to actin, calcium ions must bind to troponin, causing tropomyosin to move out of the way, exposing the binding site on actin. ATP then binds to the myosin head, leading to its activation and attachment to actin. For detachment, ATP is hydrolyzed, causing a conformational change in the myosin head that releases it from actin.


What causes cross bridge detachment?

Cross bridge detachment occurs when ATP binds to the myosin head, causing it to release from the actin filament. This process is necessary for the muscle to relax and reset for another contraction.


Atp allows what filaments to release and reset?

ATP allows actin and myosin filaments to release from each other during muscle contraction by assisting in the detachment of the myosin heads from actin. It also helps in resetting the myosin heads for the next contraction cycle by providing energy for the process of cross-bridge formation.


What molecule has a binding site for myosin heads?

Actin is the molecule that has a binding site for myosin heads. This interaction is crucial for muscle contraction as myosin binds to actin and generates force to cause muscle movement.


Difference between actin and myosin?

Myosin is a molecular motor that converts ATP to energy. Actin is responsible for cell movement and uses energy from the ATP conversion done by myosin..


What happens to ATP when it binds to Myosin?

When ATP binds to myosin, it causes myosin to release actin, allowing for muscle relaxation. The energy stored in ATP is used to detach myosin from actin and prepare the cross-bridge for another contraction cycle.


Which step allows actin and myosin to release from each other?

an ATP molecule attaches to myosin apex answers


Myosin contains two binding sites for what two molecules?

ATP (--> ADP+Pi) and actin


Which molecule binds to the myosin head in order to break the actin-myosin bond?

ATP


How is ATP used during contraction and relaxation?

During muscle contraction, ATP is essential for the interaction between actin and myosin, as it provides the energy needed for myosin heads to bind to actin and perform the power stroke. Additionally, ATP is required for the detachment of myosin from actin, allowing the cycle to repeat. During relaxation, ATP is crucial for the active transport of calcium ions back into the sarcoplasmic reticulum, which helps to terminate the contraction and restore the muscle to its resting state. Without ATP, muscles would remain contracted and unable to relax properly.


What provides the energy to break the connection between actin and myosin?

ATP, of course. When the myosin head extends towards the actin thin filament it has in it's active site ADP and P +. So, when the stroke is over the ADP and P+ fall out and are replaced by ATP, which immediately metabolizes to ADP and P +.