1. Create Action Potential
2. Action potential reaches NMJ via nerve
3. AcH crosses NMJ, excites sarcolemma
4. Signal goes down T tubules → release of calcium from sarcoplasmic reticulum
5. Troponin binds to tropomyosin
6. Tropomyosin moves to open up binding site
7. Myosin binds to actin forming cross bridge