Autorhythmic cells have unique properties that enable them to generate action potentials spontaneously. These cells have an unstable resting membrane potential due to the slow influx of calcium ions (Ca2+) and sodium ions (Na+) and a reduced efflux of potassium ions (K+). This gradual depolarization, known as the pacemaker potential, eventually reaches a threshold that triggers an action potential, leading to rhythmic contractions.
