Complex sentence: The cannabinoid receptor type 1, often abbreviated to CB 1, is a G protein-coupled cannabinoid receptor located in the brain which is activated by the psychoactive drug cannabis, by its active compound THC and by a group of endocannabinoid neurotransmitters including anandamide.
Split into simpler sentences: The cannabinoid receptor type 1, often abbreviated to CB 1, is a G protein-coupled cannabinoid receptor located in the brain. It is activated by the psychoactive drug cannabis, by its active compound THC and by a group of endocannabinoid neurotransmitters including anandamide.