Anandamide and cannabinoid receptor. Computer-generated molecular model of anandamide molecule (red, blue and white, upper left) with a cannabinoid type 1 (CB1) receptor complex (multicoloured), to which it binds. CB1 is a cell membrane receptor found mainly in the nervous system. Anandamide is a natural cannabinoid neurotransmitter produced by the body. The binding of anandamide to the receptor induces cellular responses inside the cell. Anandamide plays a role in memory, regulating feeding behaviour and motivation. CB1 receptors also bind tetrahydrocannabinol (THC), the principle psychoactive compound in the drug cannabis.