Phase 0 rapid depolarization De-polarization. Leave the the South Pole. De-plane is when I leave the aircraft. 
Phase 0 is a positive change Rapid rise from negative to positive
Phase 0 lasts 2 milliseconds in ventricular cells
Phase 0 Sodium channels open Rapid rise. Soar, soda, skyrocket. Focus on the S in sodium
Phase 1 sodium channels close Sodium channels close when the voltage reaches its peak
Phase 1 potassium channels open When there is a plunge potassium leaves the cell going negative. Flushing pot makes me feel negative
Phase 1 potassium exits the cell 
Phase 2 is not found in non pacemaker action potentials Calcium enters during phase 2 to slow the action potential since the heat function is unique
Phase 3 is rapid Repolarization Voltage decreases. Return to the South Pole (polar) with negative temps
Phase 3 calcium channels close Potassium exits the cell creating a negative charge
Phase 3 potassium leaves the cell
Phase 4 is when the cell is at rest
