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Measuring membrane potential and pH

CrazCo
in Homework Help

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Hi,

 

I am confused on how the difference in pH and membrane potential of the inside of the cell and the outside of the cell is measured.

 

Specifically, how does using a lipophilic cation help measure membrane potential? and how does measuring the concentration of weak acids and bases on each side of the membrane help measure the pH?

 

Thanks!

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