If a cell is at rest (-70 mV)and ligand-gated Na+ channels open,there will be a net movement of Na+ into the cell until
A) there are no more Na+ in the extracellular fluid.
B) the Na+ channels close.
C)the membrane potential reaches the equilibrium potential for Na+.
D)either B or C

Question

Quizplus · Accepted Answer

When ligand-gated Na+ channels open, Na+ will move into the cell until either the channels close or the membrane potential reaches the equilibrium potential for Na+, which is typically around +60 mV for Na+. The movement doesn't depend on depleting extracellular Na+.

If a Cell Is at Rest (-70 MV)and Ligand-Gated Na