Steps of skeletal muscle contraction
Step Eight
Myosin heads ratchet and pull the thin filaments toward the M- line (middle of the sarcomere).
First Step
Somatic motor neuron releases Ach (neurotransmitter).
Sixth Step
Calcium binds to troponin on the thin filament and it moves and then tropomysin moves.
Tenth Step
Calcium is pumped back into the sarcoplasmic reticulum.
Fifth Step
Calcium is released from the sarcoplasmic reticulum.
Third Step
Ion channel opens and positively charged sodium ions rush across membrane.
Fourth Step
Action potential travels down the sarcolemma and enters the t-tubules.
Ninth Step
ATP bind myosin heads and heads release the actin filaments.
Seventh Step
ATP binds to myosin heads on a thick filament and the heads cock back and bind to the Actin molecules on the thin filament.
Second Step
Ach binds to Ach Receptor on muscle cell.