A typical cell membrane is 7.96 nm thick and has an electrical resistivity of 1.33E+7 OHMm. If the potential difference between the inner and outer surfaces of a cell membrane is 74.1 mV, how much current flows through a square area of membrane 1.07 microm on a side?
Suppose the thickness of the membrane is quadrupled, but the resistivity and potential difference remain the same. How much current flows through the same area of membrane now?