Electrical Signals of Nerve Cells - Forces that generate membrane potentials
5 important questions on Electrical Signals of Nerve Cells - Forces that generate membrane potentials
How can the equilibrium potential be predicted?
Ex = (RT/zF) ln([X]out/[X]in)
What do all the symbols in the Nernst equation mean?
- Ex is the equilibrium potential for any ion X.
- R is the gas constant.
- T is the absolute temperature (in Kelvin).
- z is the valence (= electrical charge) of the permeant ion,
- F is the Faraday constant (= amount of electrical charge contained in one mole of a univalent ion).
- X is ion 'in'side and 'out'side.
How is the Nernst equation usually simplified to?
Ex = (58 / z) log ([X]out / [X]in)
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What happens if the membrane potential is plotted against the logarithm of the X concentration gradient?
What does the balance of chemical and electrical forces at equilibrium means?
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