starting point of this is a basic result from physics called the Goldman equation which we write as: I=(uzRTdxd[C]+uz2F[C]dxdV) where [C](x) is the concentration of the ion species, V(x) is the voltage across the membrane, x is the distance across the membrane, I is the current through the membrane per cm2 due to the ion, u is a constant mobility specific to the ion, and R,T,F,z are as in class. We let the thickness of the membrane be l so that 0