[Endocannabinoid system I--the role in regulation of physiology functions].

Endocannabinoid system has a wide scale of actions on CNS and on peripheral tissues. The system consists of cannabinoid receptors CB1 and CB2, endocannabinoids and their biosynthetic and degrading enzymes. CB1 receptors in high density occur on presynaptic neuronal terminals in brain influencing neurotransmission thereby number of functions--pain perception, inhibition of stress reaction, regulation of motor functions, cognition, emotional reactions, regulation of food intake, psychical homeostasis and motivation. CB1 receptors are present in GIT cells, hepatocytes, adipocytes, pancreatic isles cells. Energy homeostasis is the main function in peripheral issues. CB2 receptors are present mainly in cells of immune system, in the cilliary body of eye, in testes, vasal cells, and intestinal smooth muscle cells.