Ionic mechanisms Resting potential K equilibrium potential Nat-inward background current Extracellular space Electrogenic Na*-K pump [Na+ [C冂 K Na/K pump dNa Nongated Nongated K channel Nat channel Membrane Na* ATP [A] Cyt c[K+]• Resting potential – K+ equilibrium potential – Na+ -inward background current – Electrogenic Na+ -K+ pump Ionic mechanisms