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Old 09-07-2011
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Help nernst equation

can anybody explain me how to use nernst equation for potentials???????
thanx!!
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Old 09-07-2011
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Nerst equation is for calculating how much potential you need to stop the diffusion of any given ion through a membrane.

Example: you got high sodium (Na, a positive ion) in the extra-cellular fluid and low sodium inside of the cell, a gradient forms because of the concentration difference and Na goes inside the cell but there is a moment where the inside of the cell is so positive that the charge repels the Na ions even if there is a still a concentration difference

hope I helped
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Old 09-07-2011
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Quote:
Originally Posted by Meli View Post
Nerst equation is for calculating how much potential you need to stop the diffusion of any given ion through a membrane.

Example: you got high sodium (Na, a positive ion) in the extra-cellular fluid and low sodium inside of the cell, a gradient forms because of the concentration difference and Na goes inside the cell but there is a moment where the inside of the cell is so positive that the charge repels the Na ions even if there is a still a concentration difference

hope I helped
thanx meli!!!! i got what you said. i have confusion with equation, how to calculate potential by nrst equation??????
ex...Ex=.60/z log10 [NA]out/[NA]out....
thanx
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