2013 Ion Channel Physiology

Equilibrium (or reversal) potentials

Critical Fact Icon For each ion, the equilibrium (or reversal) potential is the membrane potential where the net flow through any open channels is 0. In other words, at Erev, the chemical and electrical forces are in balance. Erev can be calculated using the Nernst equation. In mammalian neurons, the equilibrium potential for Na+ is ~+60 mV and for K+ is ~-88 mV.

K+ Reversal Potential (as an example)


LEARNING EXERCISE:

Email: Dr. Janet Fitzakerley | ©2013 University of Minnesota Medical School Duluth | Last modified: 21-sep-13 9:37 AM