In order for nerve cells and muscle cells to function properly, they require a high concentration of potassium ions inside the cells and a high concentration of sodium ions outside the cells.

To maintain this condition, cells utilize sodium-potassium pumps embedded within their cellular membranes to move the ions against their concentration gradients.
Since sodium-potassium pumps require an input of energy to operate, they are an example of...

Question

In order for nerve cells and muscle cells to function properly, they require a high concentration of potassium ions inside the cells and a high concentration of sodium ions outside the cells.

To maintain this condition, cells utilize sodium-potassium pumps embedded within their cellular membranes to move the ions against their concentration gradients. 
Since sodium-potassium pumps require an input of energy to operate, they are an example of...

anonymous · Answer

its an example of active transport since the question is requiring an input of energy.