00:01
Okay, i'm going to answer this question.
00:02
Let's talk about the cell memory, okay? if this is your cell memory of a neuron, let's suppose, normally the voltage of your cell at the west is going to be like about minus 70 million volts.
00:14
Okay, so this is the voltage of your cell at best.
00:17
It means when your cell is not developing an action potential or it is not stimulated.
00:22
Remember that here i'm going to have a pump that is a sodium potassium atp pump that is going to pump three sodium ions out of a cell in exchange by two potassium ions.
00:31
Inside of a cell.
00:32
Also you have here potassium channels that are going to be constantly moving potassium out of the cell.
00:39
So as you can see here, you are pumping, remember that both potassium and sodium are positive charged ions.
00:47
They have a positive charge.
00:49
So here, for example, you're moving three positive ions out of cell in exchange by only two positive ions inside of a cell.
00:57
So you're going to have a net movement.
00:59
A movement of positive ions outside of a cell of one.
01:04
So you're going to have one extra positive charged ion out of a cell.
01:10
And this is why the extracellular is positively charged in comparison with the intracellular.
01:16
So this is what you're going to have, i guess, that your voltage is going to become minus 70mills because of all of these transporters that you have on a cell memory...