Functions of calcium (2), sodium (1), potassium (1), and ATP (1).
Calcium: causes the release of the neurotransmitter, attaches to triponin and unlocks the binding site.
Sodium: rushes into cell causing the cell to go from a - charge to a + charge.
Potassium: slowly comes out of the cell the same time as the sodium moving the charge back to a -.
ATP: is the energy of the muscle (most efficient)