When we add all these guys up, we get our final cell voltage or the resting electrical potential. Now, today, to save time, I'm only going to show you for this potassium ion. You can do these on your own. So let's take this potassium ion and let's create a concentration cell or a specialized concentration cell called a neuron cell. So this is our electrochemical concentration cell for potassium. This is our negatively charged anode and our positively charged cathode.