The equilibrium potential of K ions in nerve cells is about -90 mV.The membrane potential of typical nerve cells at rest is -70 mV.Therefore
A)Increasing the permeability of a resting neuronal membrane to K ions will increase the membrane potential (that is, make it more negative, inside with respect to outside)
B)In nerve cells at rest, there is a net diffusion of K ions out of the cell
C)Increasing the membrane potential of a nerve cell would slow the diffusion of K ions out of it
D)Potassium is not the only permeant ion at rest
E)All of the choices are true

Question

Quizplus · Accepted Answer

The resting membrane potential is influenced by multiple ions, not just K+. Increasing K+ permeability would make the membrane potential more negative, closer to the K+ equilibrium potential. At rest, K+ diffuses out due to its concentration gradient, and increasing membrane potential would reduce this diffusion.

The Equilibrium Potential of K Ions in Nerve Cells Is