11.     Consider a squid axon bathed in seawater under artificial conditions, and the following on 

concentrations: [K]_i = 400 mM and [K]_o = 10 mM, [Na]_in = 50 mM, [Na]_o = 460 mM.

Predict equilibrium potentials E_K and E_Na at a temperature of 13^oC. Assuming that the Na permeability of the cell membrane is 1/50 that of the K permeability, predict the resting potential, E_m, assuming that Cl is in equilibrium.

 

 

13     Adjacent to the neuron is a glial cell, which has no sodium channels in the plasma membrane.

Predict its resting potential, using the ion concentrations provided in Problem 11.