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Cross Bridge
The myosin heads bind with the actin filaments.
Power Stroke
The myosin heads move and pull the actin filaments toward the center of the sarcomere causing actin to slide over the myosin
Cause of the power stroke
The release of ADP and Pi
Detachment
The ATP molecule binds to the myosin head causing actin-myosin cross bridges to break, (ATP pulls myosin head off actin)
(ATP pulls myosin head off actin)
Hydrolysis
Energy causes the myosin head to "cock" back like the trigger of a gun and is ready to attack.
Releases energy in hydrolysis
Hydrolysis of ATP releases energy
