Answer the following question given this paragraph: Nervous tissue is made up of neurons , or nerve cells, that carry electrical messages. Nervous tissue makes up the brain and the nerves that connect the brain to all parts of the body. Q: What is the nervous tissue in the brain and in the rest of the nervous system made up of? A:

Choose from:
(I) electrons.
(II) plastic.
(III) ions.
(IV) neurons.
The answer is:
(IV)