Narcotic - (nar-cot-ic)
A drug that produces numbness or dulls the senses and induces profound sleep; often taken for pleasure or to reduce pain; can lead to addiction
Nasopharynx - (Ney-zo-fa-rinks)
The area of the upper throat – the portion that lies behind the nose
Neurologist - (new-ro-lo-gist)
A doctor specialising in the diagnosis and treatment of disorders of the nervous system
Neurotransmitter - (neu-ro-trans-mit-ter)
Chemicals that transmit impulses between nerve cells