Dr Karl

And then suddenly things start equalizing and you get a temporary depolarization.

And then that depolarization runs in a particular direction away from the nerve body.

And I suddenly realized I don't know why it runs away from the nerve body.

Maybe it goes in both directions.

I don't know.

But it runs away.

And the bigger the nerve, the faster it travels.

And the smaller the nerve, the

the slower it travels.

So something like smell would be fairly small, pain would be fairly big because you want to know about pain fairly quickly.

And this depolarisation potential then runs to the end of a nerve and you've got a sort of a rounded end, sort of a male-female thing like two soup bowls in each other, and it causes depolarisation at the end of the nerve...

and there's a thing called the synapse, the gaps, about 20 billionths of a metre across, and suddenly these tiny vesicles of chemicals, little balls of chemicals, merge with the cell wall and go into the gap.

And they could be adrenaline, it could be one, and they travel that very small distance very quickly, and when they land on receptors on the next nerve...

they set off another depolarization.

So it goes electricity, chemicals, electricity, chemicals as it travels from one nerve to the next through your body and then you can end up doing something like I want to move my finger and your finger moves.

Now, I'm guessing, does that help a bit and can I suggest Wikipedia as well?

And the sodium potassium pumps work on a three to two ratio of three atoms of one to two atoms of the other.

And you normally have a high blood sodium.

So inside the cells is very low and you have a low blood

blood, potassium.