1.The influx of calcium, triggering the exposure of the binding sites on actin.
2.The binding of myosin to actin.
3.The power stroke of the cross bridge that causes the sliding of the thin filaments.
4.The binding of ATP to the cross bridge, which results in the cross bridge disconnecting from actin.
5.The hydrolysis of ATP, which leads to re-energizing & repositioning of the cross bridge.
6.The transport of calcium ions back to the SR.