Think about evolution when you read the article. It implies that:

(a) cannabinoid receptors are traits that arose before the major divisions in the animal kingdom.

AND/OR

(b) cannabinoid receptors are traits that have been important to the survival of many animal species.
a. beezy Reviewed by a. beezy on . Your Brain: On Drugs? I posted this on another thread, but I think people need to see it, so here it is again. ****The following is copied from http://en.wikipedia.org/wiki/Cannabinoid Cannabinoid Receptors Before the 1980s, it was often speculated that cannabinoids produced their effects through nonspecific interaction with cell membranes, instead of interacting with specific receptors. The discovery of the first cannabinoid receptors in the 1980s helped to resolve this debate. These receptors are common Rating: 5