- #1
JanSpintronics
- 32
- 2
Good evening,
I got a seriously problem at understanding the membrane potential for ions in a cell. Particulary, i don't understand the case for example for ions with a charge of 2 or higher. I take a look on two scenarios: If you got an ion like calium and got a concentration ratio of 1:10 (insideutside) in a cell you get a voltage of -58mV. If you then just change the ion with calzium (its charge is +2) and got the same concentration ration, then you will have exactly the half of the potential. And this is what i don't get. Why is that so?
For me, potential is a quantity that is depending from the amount of charge you have there. As far as i understand the potential, i thought there will be the same amount of charge for both cases (calium und calzium). But it seems its not, why is that so?
Hope someone can help me i really struggle with that question and it won't let me rest haha
Best Regards
I got a seriously problem at understanding the membrane potential for ions in a cell. Particulary, i don't understand the case for example for ions with a charge of 2 or higher. I take a look on two scenarios: If you got an ion like calium and got a concentration ratio of 1:10 (insideutside) in a cell you get a voltage of -58mV. If you then just change the ion with calzium (its charge is +2) and got the same concentration ration, then you will have exactly the half of the potential. And this is what i don't get. Why is that so?
For me, potential is a quantity that is depending from the amount of charge you have there. As far as i understand the potential, i thought there will be the same amount of charge for both cases (calium und calzium). But it seems its not, why is that so?
Hope someone can help me i really struggle with that question and it won't let me rest haha
Best Regards