Question

On a resting nerve, what is true?

• A. 3 Na+ are pumped out for every 2 K+ pumped in
• B. 3 Na+ are pumped in and 2 K+ pumped out
• C. There is no Na – K pump
• D. Na – K pump stops working

Answer 1

The correct option is A

3 Na+ are pumped out for every 2 K+ pumped in

When the neuronal membrane is at rest, the resting potential is negative due to the accumulation of more sodium ions outside the cell than potassium ions inside the cell.