Just for the record, there are several different types of synapses in the body... electrical, chemical, etc. which is how the nerve endings communicate with one another. If you'll google-fu "synapses", you'll find some interesting information about the body's electrical potentials...
http://en.wikipedia.org/wiki/Synapse
http://www.royalrife.com/haltiwanger1.pdf
http://en.wikipedia.org/wiki/Synapse#Relationship_to_electrical_synapses

If you don't think the body has "potential", let me walk up close to you on a cold day when I'm wearing tennis shoes, and I'll make a spark jump to your earlobe... The body is a walking capacitor...

P.S. if you're a little overwhelmed with the "explanation", there's a "kids section" on this subject...

_________________________
What man is a man that does not make the world a better place?... from "Kingdom of Heaven"