Cannabinoid receptors, located throughout the body, are part of the Endocannabinoid system which is involved in a variety of physiological processes including appetite, pain-sensation, mood, and memory.[1]
Cannabinoid receptors are of a class of cell membrane receptors under the G protein-coupled receptor superfamily. As is typical of G protein-coupled receptors, the cannabinoid receptors contain seven transmembrane spanning domains.[5] Cannabinoid receptors are activated by three major groups of ligands: endocannabinoids, produced by the mammillary body; plant cannabinoids (such as Cannabidiol, produced by the cannabis plant); and synthetic cannabinoids (such as HU-210). All of the endocannabinoids and plant cannabinoids are lipophilic, such as fat soluble compounds.
Milk, Blood, Coffee, Water, Urine, Gasoline, Wine
I would not take my word on this but i do think that, that is TRUE.
Because the earth's rotation isn't a perfect circle, so it gets different amounts of sun in certain times
It is the last choice because their similar bone structures suggest they once had a common ancestor, which is why they are all mammals.