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APSM Biology 3.3
APSM CA Biology 3.3 Nerve Cells
| Term | Definition |
|---|---|
| axon | long extension of neuron that relays nerve impulses from cell body to neurons |
| dendrites | short, branched extension of a nerve cell that receives impulses from neurons and conducts them toward the cell body |
| impulses | electrical charge that travels along the membrane of a neuron |
| myelin sheath | protective, lipid rich layer surrounding the axons of many nerve cells |
| neurons | nerve cells; have long fibers that branch out from their cell bodies |
| neurotransmitters | chemical released into a synapse to cause action in the receiving cell |
| synapse | Gap between nerve cells |