1. 11.4 Notes – Drug Use and Abuse What does the nervous system control? –Senses, thoughts, movements, and body functions neurons – cells that make up the nervous system (nerve cells) How many parts are there to the nervous system? –2 central nervous system – “CNS” the brain and the spinal cord peripheral nervous system – “PNS” the nerves that connect the central nervous system to all parts of the body

2. 11.4 Notes – Drug Use and Abuse brain – the command center, or coordinator of the nervous system spinal cord – a long bundle of neurons that relays messages to and from the brain and all parts of the body 3 parts of the brain: –cerebrum – processes thoughts, interprets information, and controls voluntary muscle movement –cerebellum – maintains balance and coordination –brain stem – controls involuntary muscle movement

3. 11.4 Notes – Drug Use and Abuse What does alcohol/drugs do to the nervous system? –hallucinations –kills brain cells that can never re-grow –Affects heart rate –Affects breathing –Affects appetite –Affects sleeping (possible insomnia)