Reversal potential/Equilibrium potential Definitions! (should be easy for you guys)

Dag Stenberg dag.stenberg at
Mon Apr 28 11:02:14 EST 2003

chrissy <chrismin at> wrote:
> Just a simple question (hopefully):
> What's the difference between the reversal potential and the
> equilibrium potential for ion flow in neurons?
> Both have to do with balancing electrical potentials, don't they?

When a membrane opens its sodium channels to let in sodium ions, its
potential starts to approach the equilibrium potential for sodium, which
is inside positive. As the membrane potential reverses to inside
positive, one talks about reversal potential.

Dag Stenberg

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