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Unformatted text preview: The autonomic nervous system has sympathetic and parasympathetic divisions. Cells of the Nervous System Neurons o Neurons receive stimuli and transmit action potentials. Neurons consist of a cell body, dendrites, and an axon. o Neurons are multipolar, bipolar, or unipolar. Neuroglia o Neuroglia are the support cells of the nervous system. They include astrocytes, microglia, ependymal cells, oligodendrocytes, and Schwann cells. Myelin Sheaths o Axons are either unmyelinated or myelinated. Organization of Nervous Tissue o Nervous tissue consists of white matter and gray matter. White matter forms nerve tracts in the CNS and nerves in the PNS. Gray matter forms the cortex and nuclei in the brain and ganglia in the PNS....
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- Fall '10