<P> There are currently two known subtypes of cannabinoid receptors , termed CB and CB . The CB receptor is expressed mainly in the brain ( central nervous system or `` CNS '' ) , but also in the lungs , liver and kidneys . The CB receptor is expressed mainly in the immune system and in hematopoietic cells . Mounting evidence suggests that there are novel cannabinoid receptors that is , non-CB and non-CB , which are expressed in endothelial cells and in the CNS . In 2007 , the binding of several cannabinoids to the G protein - coupled receptor GPR55 in the brain was described . </P>
<P> There are currently two known subtypes of cannabinoid receptors , termed CB and CB . The CB receptor is expressed mainly in the brain ( central nervous system or `` CNS '' ) , but also in the lungs , liver and kidneys . The CB receptor is expressed mainly in the immune system and in hematopoietic cells . Mounting evidence suggests that there are novel cannabinoid receptors that is , non-CB and non-CB , which are expressed in endothelial cells and in the CNS . In 2007 , the binding of several cannabinoids to the G protein - coupled receptor GPR55 in the brain was described . </P>
where are cannabinoid receptors located in the brain
where are cannabinoid receptors located in the brain
central nervous system
central nervous system