Study GuideAnatomy and Physiology–The Nervous System1.Nervous System TerminologyWhen studying the nervous system, you will see many special terms used again and again. Learningthese words makes anatomy much easier and helps you understand diagrams and textbookdescriptions.Important Nervous System Terms1. Nerve Fiber, Nerve, and Nerve TractThese terms describe bundles of neuron “wiring,” but the location matters:•Nerve fiber= anaxon or dendrite•Nerve= a bundle of nerve fibers in thePNS(peripheral nervous system)•Nerve tract= a bundle of nerve fibers in theCNS(central nervous system)2. White MatterWhite matteris found in the CNS and contains mainly:myelinated axonsIt looks white becausemyelinhas a whitish, fatty appearance.3. Gray MatterGray matteris also found in the CNS and contains:•neuroncell bodies•dendrites•axon terminals•unmyelinated axons•neurogliaIt appears gray because it lacks large amounts of myelin.Preview Mode
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