In each of a, b, and c of Problem 10, will any appreciable transport of material take place in establishing the membrane potential? Briefly explain each answer.

Problem 10.

Calculate the equilibrium membrane potentials to be expected across a membrane at 37 °C, with a NaCl concentration of 0.10 M on the “right side” and 0.01 M on the “left side”, given the following conditions. In each case, state which side is (+) and which is (-). 

(a) Membrane permeable only to Na⁺ 

(b) Membrane permeable only to Cl^– 

(c) Membrane equally permeable to both ions.