help plz with physioEX 8.0 ch6 review sheet, cardiovascular dynamics

Phase 0 A) Rapid upswing in membrane potential; sodium ions enter cardiac cell.

Phase 1 B) Membrane potential falls slightly and then rebounds as potassium flow out of the cell decreases and calcium flows into the cell.

Phase 2 C) Internal potential falls, significant amounts of potassium flow out of the cell, calcium flow into the cell decreases, membrane repolarizes until the resting potential is reached.

Phase 3 D) Period of resting potential until the next depolarization.

Phase 4 E) "The plateau phase"; when the membrane remains in a depolarized state; potassium channels stay closed and calcium channels stay open.