I don’t know about smoke shop cannabinoids (synths, right?); but there just are CB2 receptors all over the body, except not in the brain where the CB1 receptors sit. The best way I have of explaining it is that there is a body/organism wide endocannabinoid signalling network using the body’s natural cannabinoids. Here is a link from the University of South Carolina
Professors of pathology, microbiology and immunology Prakash Nagarkatti and Mitzi Nagarkatti write for The Conversation on endocannabinoids, compounds found in humans that are similar to those found in marijuana.
sc.edu
Two natural endocannabinoids in people are anandamide, or AEA, and 2-arachidonoyl glycerol, known as 2-AG.
Some people call Cannabis the ‘tree of life’ or a ‘gift from God’. Maybe certain branches of human evolution have prospered (or died out) b/c of an ability or inability to respond to this plant. The reason I’m scared (honestly and literally) of synths is that they have different abilities to bind to different receptors all over the body. I just don’t know if scientists have isolated, purified and sequenced CB2 receptors…..and found or not differences.
Tom