| A | B |
| Action potential | membrane potential of an active neuron; nerve implies |
| axon | nerve cell process that transmit impulses aaway from the cell body |
| central nervous system | brain and spinal cord |
| dendrite | nerve cell process that transmits electrical signals toward the cell body |
| glia | supporting cells of nervous tissue |
| myelin | white, fatty substance found in the myelin sheath around some nerve fibers |
| nerve | bundle of peripheral nerve fibers |
| neuron | nerve cell, including its axons and dendrites |
| reflex arc | nerve pathways to and from the CNS that forms the basis for a reflex |