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Definition
| dark staining RER because it is actively making protein, only present in soma, not axon or axon hillock. aka chromatophilic substances |
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Term
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Definition
| visible with silver or gold stains. maintain shape of cytoplasmic extensions |
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Term
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Definition
| transmit impulses towards cell body. typically several and they are highly branched |
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Term
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Definition
| long, typically nonbranchinb process that transmits impulses away from cell body |
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Term
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Definition
| enlarged terminal end of an axon. site of neurotransmitter release |
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Term
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Definition
| primary sensory neurons have this kind of shape |
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Term
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Definition
| allows impusle to travel up to 150X faster along an axon |
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Term
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Definition
| myelinates several axons in the CNS |
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Term
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Definition
| myelinates only one axon, but can ensheath several unmyelinated axons in PNS |
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Term
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Definition
| myelinating cells are approx 1-2mm in length, which leaves gaps between myelin sheaths |
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Term
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Definition
| specialized cellular junction that allows communication between cells even though the participating cells are not in direct physical contact |
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Term
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Definition
| contains neurotransmitter plus packaging and transport proteins. contents released into synaptic cleft upon stimulation of action potential |
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Term
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Definition
| supporting cells of nervous system |
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Term
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Definition
| large star shaped cells. fibrous and protoplasmic types. form framework guide during fetal development. move fluid from extracellular spaces to blood vessels to maintain [ionic]. play role in BBB by forming end feet around blood vessles which creates a highly selective permeability. form scar when neurons are lost (Gliosis) |
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Term
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Definition
| appear as ciliated simple cuboidal epithelial cells that line the ventricles and the central canal of the spinal cord. |
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Term
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Definition
| unique basement membrane via intertwining of ependymal cells and underlying astrocytes |
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Term
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Definition
| immune cells of CNS. phagocytosis. |
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Term
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Definition
| unmyleinated fibers and nerve cell bodies |
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Term
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Definition
| entanglements of nerce cell processes in CNS |
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Term
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Definition
| myelinated and unmyelinated tracts in CNS |
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Term
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Definition
| lining of ventricles that produces CSF via selective filtration and supplementation. simple cuboidal epithelium overlying highly vascularized connective tissue |
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Term
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Definition
| surrounds individual axons/dendrites and any associated schwann cells |
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Term
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Definition
| groups axons/dendrites into small bundles called fascicles |
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Term
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Definition
| tough outer sheath that binds fasciles into a nerve |
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Term
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Definition
| only sites where neuron cell bodies are located outside the CNS |
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Term
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Definition
| pseudounipolar neurons surrounded by a capsule composed of satellite cells |
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Term
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Definition
| multipolar neurons that lack capsule of satellite cells. cell bodies accumulate lipofuschin (rust colored wear and tear pigment) with age |
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Term
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Definition
| small and embedded within wall of organ |
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