Medicine The plateau (phase 2) of the ventricular myocyte action potential A Describes when Ca2+ is the only ion moving through the membrane B Describes when Ca2+ influx is balanced by Na+ efflux C Describes when Ca2+ and Na+ influx is balanced by K+ efflux D Can be prolonged by sympathetic nerve stimulation 💡 Explanation The plateau (phase 2) of the ventricular myocyte action potential ✓ Correct Answer: C. Describes when Ca2+ and Na+ influx is balanced by K+ efflux