5. Gray/White Matter and Clusters

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10 Terms

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White matter?

Myelinated axons

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Gray matter?

Cell bodies, dendrites, small unmyelinated axons

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Are dendrites and cell bodies ever myelinated?

Never

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Nucleus?

Group of cell bodies in the CNS

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Ganglion?

Group of cell bodies in the PNS

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Nerve?

Bundle of axons in the PNS

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Tract?

Bundle of axons in the CNS

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Cell body clusters: CNS vs. PNS?

CNS: nucleus

PNS: ganglion

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Axon bundles: CNS vs. PNS?

CNS: tract

PNS: nerve

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Example of a tract and a nucleus in the CNS.

Corpus callosum = tract

caudate nucleus = nucleus