Quote Originally Posted by misspotn
The cannaboid receptors aren't really THC receptors. They are receptors for molecules that our body uses that are very structurally similar to THC. Because they aren't very specific (many receptors in our bodies are VERY specific for only 1 molecule), THC can also bind to these receptors and act on them. If I went back and actually read my neurophysiology notes, I'd have a much more intelligent answer. I see your point, but it's a happy accident that THC can utilize a receptor in the human brain.
They're also in our livers. And the receptors respond to admine, or something spelled similar, which is a (non-psychoactive) chemical produced by your body. THC molecules happen to resemble this other molecule, so the receptor picks them up. This is true for a LOT of psychoactives.

You can BELIEVE whatever you want about having cannibinoid receptors, though. Freedom of religion... or FROM religion, for us atheists.


Info:

http://en.wikipedia.org/wiki/Cannabinoid_receptor