Question

In a nerve if sodium pump is blocked, which of the following is most likely to happen?

• A. ${Na}^{+}$ and $K^{+}$ will increase outside the cell
• B. ${Na}^{+}$ outside the nerve will increase
• C. ${Na}^{+}$ inside the nerve will increase
• D. $K^{+}$ inside the nerve will increase

Answer 1

The correct option is A ${Na}^{+}$ and $K^{+}$ will increase outside the cell

• The Sodium Pottasium pump works against the concentration gradient and helps in movement of 2 Pottasium ions inside the cells with subsequent removal of 3 sodium ions.
  
• If Na/K ATPase is blocked, the sodium ions inside the cell after an Action Potential will stay there since there is no pump to remove them.

So, the correct option is ' Na+ inside the cell will increase'.