Resting membrane potential of a neuron is: (A) -9mV, (B) -50mV, (C) -70mV, (D) -100mV
Answer is C. In neurons, the resting membrane potential is usually about - 70mV, which is close to the equilibrium potential for K+. Because there are more open K+channels than Na+ channels at rest Ref: Ganong&;s Review of medical physiology;25th edition; pg: 90