Which is TRUE about typical, resting neurons?
A. The plasma membrane is completely impermeable to potassium ions.
B. The concentration of sodium ion is greater inside the cell than outside.
C. The permeability of the plasma membrane to potassium ions is much greater than its permeability to sodium ions.
D. The plasma membrane is completely impermeable to sodium ions.
E. The plasma membrane is most permeable to sodium ions.
Answer: C
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