GGM Posted June 26, 2017 Share Posted June 26, 2017 (edited) Hi evryone, I'm new in this forum and I didn't see an "exercise/ Q&A" topic, so I decided to post it here. In a cell (negative internal), a positive ion has a equilibrium potential of "-90 mV" , which contrasts a concentration of "135 mM / L" (between the cell's inside and outside). Indicate if the ion's concentration is greater outside or inside. I suppose that I've to use Nerst eq to find out if ln(out/in) is >1 or 0<x<1. Can you help me? P.S. Sorry for my bad english. Edited June 26, 2017 by GGM Link to comment Share on other sites More sharing options...
hypervalent_iodine Posted June 26, 2017 Share Posted June 26, 2017 Where exactly are you stuck? Link to comment Share on other sites More sharing options...
GGM Posted June 27, 2017 Author Share Posted June 27, 2017 Now I solve it setting xout+xin=1, so i've just the variable "xin" (xout=1-xin) . z=+1 . Ex= (61,5/z) * log(1-xin/xin) Is correct? My result is " 0.96% ion is intracellular and 0.04 extracellular". Link to comment Share on other sites More sharing options...
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