By using ATP, molecules will begin to pump our three sodiums outside of the cell and potassium into the cell against electrochemical gradient. And that's exactly why we need to use energy. So basically, this will ultimately return our potential of the membrane back to the resting membrane potential of about negative 70 millivolts. So this is known as our action potential. So one last thing that I want to mention about our action potential is the fact that our action potential is all or nothing. So our action potential is all or nothing.