[THIS IS A JOKE, I AM NOT A TRAINED PROFESSIONAL] A: some idiot running across the street and getting run over by a semi truck. This would weed out the... AHEM lower IQ folk and people would be like: you remember when Jerry ran across the street and got smeared on the windscreen of that semi going 80 MPH down I-95? Yeah, let’s not just run across the street and be smart. Moral of the story is don’t be a Jerry.
I think the answer is color.
<span>Glial cells in the white matter help promote communication between the nerve impulses in the gray matter. They differ because in the peripheral nervous system there is more of a fatty substance that acts as a cushion between the impulses, which is a little different than helping the nerve impulses along intentionally. The cushioning may aid in transmission indirectly, but serves as more of a safety zone.</span>
1. Cigarettes
2. Beer
3. Antacids
4. Cocaine