Section 1
The Origin of the Resting Membrane Potential
What is the current of an ion at its equilibrium potential? What would the current look like as a function of membrane potential if the ion had the same concentration on both sides of the membrane?
If the conductance of the membrane to $\mathrm{K}^{+}$was increased, what would happen to the equilibrium potential for $\mathrm{K}^{+}\left(E_{\mathrm{K}}\right)$ ? What would happen to $E_m$ ?
Why is $\mathrm{Cl}_o$ in the denominator of the $\mathrm{GHK}$ equation when $\mathrm{Na}_{\mathrm{o}}$ and $\mathrm{K}_{\mathrm{o}}$ are in the numerator?
What potential is calculated by the Nernst equation?
What potential is calculated by the GHK equation?
What is a siemen?
What is meant by an inward current? Outward current? What sign does an inward current have? If $\mathrm{Cl}^{-}$exits the cell, does it make a positive or negative current?