????? ????? ?????? ??? ?????? ??????? ??????????? ??? ???? ????? ??? ??? ?? ??????? ???? ???? ?????? ??????? ?? ???????.Folks who smoke come to be hooked on nicotine, a chemical in tobacco. Nicotine functions in the anxious procedure, where by it binds to receptors and triggers the discharge of a chemical messenger, dopamine, which performs a compo