Unformatted text preview: . Dendrites receive information from other neurons or from sense organs. • The single long fiber that extends from the neuron is called an axon. Axons send information to other neurons, to muscle cells, or to gland cells. What we call nerves are bundles of axons coming from many neurons. • Some of these axons have a coating called the myelin sheath . Glial cells produce myelin, which is a fatty substance that protects the nerves. When an axon has a myelin sheath, nerve impulses travel faster down the axon. Nerve transmission can be impaired when myelin sheaths disintegrate. • At the end of each axon lie bumps called terminal buttons. Terminal buttons release neurotransmitters , which are chemicals that can cross over to neighboring neurons and activate them. The junction between an axon of one neuron and the cell body or dendrite of a neighboring neuron is called a synapse ....
View Full Document
- Winter '09