Nicotine- parasympathetic and sympathetic, what does this mean?

2 parts of nervous: system. There is a voluntary nervous system which allows us to move muscles and is under our control, and there is an autonomic nervous system which is not generally under our control. This system has 2 main components - the sympathetic system which is the "fight and flight" side, speeds up the heart, dilates pupils, elevated BP, reduces sweating. The parasympathetic system does the opposite.