Action Potential:An action potential is a rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane, creating an electrical impulse that propagates along the cell.
Pacemaker Cells:Pacemaker cells are specialized cardiac cells that naturally generate and propagate electrical impulses, thus setting the rhythm of heart contractions.
Cardiac Cycle:The cardiac cycle involves all events related to the flow of blood through the heart during one complete heartbeat, including both contraction and relaxation phases