First there's Potassium. Everything's negative inside and we're all cool.
Then something stimulates shit and BAM tons of Sodium pours in and everythings all positive.
The Potassium says 'Fuck That' we're out. Potassium splits in droves, and being that they're positive, everything gets all negative again.
Such is the life inside a Neuron...
Thanks for stoppin' by.