Electrophysiological properties(电生理 特性) o Resting membrane potential 50~-60mV lonic basis o Em(selective membrane permeability to K+, Nat Cl and Cazt) o Electrogenic Na*-K* pump◼ Electrophysiological properties (电生理 特性)  Resting membrane potential ◼ −50 ~ − 60 mV ◼ Ionic basis  Em (selective membrane permeability to K+ , Na+ , Cl− and Ca2+)  Electrogenic Na+ -K+ pump