Which describes the ion concentrations inside and outside of a neuron?
A) Sodium and potassium ions are both at higher concentration on the inside of the cell.
B) Sodium and potassium ions are both at higher concentration on the outside of the cell.
C) The sodium ion concentration is higher on the inside of the cell and potassium ion concentration is higher on the outside of the cell.
D) The sodium ion concentration is higher on the outside of the cell and potassium ion concentration is higher on the inside of the cell.
E) The concentrations of sodium and potassium ions are both equal inside and outside of the cell.

Question

Quizplus · Accepted Answer

The sodium ion concentration is higher on the outside of the cell and potassium ion concentration is higher on the inside of the cell. This creates an electrochemical gradient and potential difference across the cell membrane, which is essential for nerve function.

Which Describes the Ion Concentrations Inside and Outside of a Neuron