Changes in membrane potential are a direct result of:
A)changes in a G protein activity.
B)changes in the activity of ion pumps.
C)reaching threshold.
D)summation of impulses
E)changes in the permeability of the membrane to ions.

Question

Quizplus · Accepted Answer

Changes in membrane potential are a direct result of changes in the permeability of the membrane to ions. When ion channels open or close, the membrane becomes more or less permeable to certain ions, which can cause a change in the membrane potential. This can lead to depolarization (an increase in potential), hyperpolarization (a decrease in potential), or repolarization (a return to resting potential). Changes in G protein activity, ion pumps, reaching threshold, and summation of impulses can all indirectly affect membrane potential through their impact on ion channel activity and permeability.

Changes in Membrane Potential Are a Direct Result Of