Chapter 4: Body Tissues and Membranes ~ 4.4 Nervous Tissue
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4.4 Nervous Tissue
Last updated 2:01 AM on 5/29/25
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12 Terms
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found in brain and spinal cord
contains neurons and supporting cells called neuroglia
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Receives signal
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contains nucleus
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conducts signal to next cell
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neuroglia
nervous tissue cells more numerous than neurons
nourish and support neurons
no impulse
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4 types of neuroglia
microglia, astrocytes, oligodendrocytes, & ependymal cells
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Microglia
engulf bacteria and cellular debris
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Astrocytes
provide nutrients to neurons
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Oligodendrocytes
form myelin
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Ependymal
line ventricles and cavities
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Schwann cells
neuroglia located outside brain or spinal cord
produce myelin sheath on neurons outside of brain or spinal cord
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What are the gaps between myelin sheaths called?
Nodes of Ranvier
Note 
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