Inward flow of Na+ in heart leads to: (A) Plateau phase, (B) Action potential, (C) Repolarization, (D) No Change
Answer is B. Ans. (b) Action potential(Ref: Ganong, 25th ed/p.521)To be more precise, influx of sodium ions causes depolarization of ventricular action potential. It is usually seen in the form of a rapid upstroke (spike)