- University of Chapel Hill
- Physiology 202
- Membrane Potentials
Last Modified: 2011-07-01
voltage difference across the membrane
arises from 2 factors: ion gradients and permeability to ions
it ranges from -40 to -90 mV
Eion for any ion is the Em (membrane potential) at which net diffusion of that ion ceases
when Eion = Em
can be calculated using the Nernst equation
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