CELLS OF THE NERVOUS SYSTEM What are neurons and what do they do? A. Neurons
1. There are two main cell types in the nervous system.
a. Neurons are specialized to respond rapidly to signals and send signals of their own. b. Glial cells hold neurons together, guide their growth, secrete and absorb chemicals to
maintain a stable chemical environment, and send a limited number of signals between
neurons.
2. All body cells have some features in common.
a. An outer membrane selectively allows only some substances to pass in and out.
b. The cell body contains the nucleus.
c. Mitochondria turn oxygen and glucose into energy.
3. Neurons have special features that permit effective signal communication:
a. An axon is a cell fiber that carries signals away from the cell body. Most neurons have
just one axon. b. A dendrite is a cell fiber that receives signals from other neurons and carries information
toward the neuron's cell body. Most neurons have......

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Title: Neurotransmitters
Approximate Word Count: 606
Approximate Pages: 3 (250 words per double-spaced page)

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