# data[].attributes.body
step 2: release of ADP and inorganic phosphate causes myosin head to pivot and pull actin towards m line

# data[].attributes.body
Step 3: ATP attaches to myosin head which  the cross bridge.

# data[].attributes.body
Step 4:  energy form hydrolysis of ATP makes the head cock back into high-energy state

# data[].attributes.body
step 1: high-energy myosin heads attach to actin myofilaments to form cross bridge.

# data[].attributes.body
Step 3 and 4: Ca2+ combines with troponin which changes the shape of tropomyosin that exposes the myosin binding sites are exposed. Myosin binds to the binding sites and creates a cross-bridge and contraction begins.

# data[].attributes.body
Step 2: When the action potential goes down the t tubules the SR release Ca+ which flow into the cytosol.

# data[].attributes.body
Step 1: Action potential goes through sarcolemma and down the t tubules

# data[].attributes.body
When an action potential occurs Ca+ is released and this releases ACh into the cleft. Depolarization and repolarization occurs in which voltage gated Na+ release Na+ that floods in the cell and then voltage gated K+ release K+ that floods out of the cell to bring it back to resting membrane  potential.