1. Axons connected on muscles are excited
2. Action potentials are transmitted along the muscle fiber membrane and into the T-Tubules
3. Action potentials excite the T-Tubules, which is connected to the Sarcoplasmic reticulum
4. The Sarcoplasmic reticulum is the storage of Ca+2
5. Action potential triggers the release of Ca+2 into the actin and myosin
6. Ca+2 binds to troponin
7. This frees up space (by moving tropomyosin – which is initially blocking myosin binding sites)
8. Myosin uses an ADP (ADP goes away) that will cause the power stroke of the actin filaments
9. ATP will bind to myosin to disconnect myosin from actin filaments
10. Process will repeat under the condition that Ca+2 is present