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12 Cards in this Set
- Front
- Back
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What is the cell body of a neuron called?
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Soma
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What allows axonal transport in a neuron?
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Microtubules
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What is anterograde?
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Axonal transport along nerve cell processes AWAY from the cell body 300-400mm/day
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What is retrograde?
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Axonal transport along never processes TOWARDS the cell body 50-200m/day
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What is NISSL substance?
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Material consisting of granular endoplasmic reticulum and ribosomes occurring in nerve cell bodies and dendrites
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What are the function of oligodendrocytes?
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Myelinating in the CNS
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What are the function of shwaan cells?
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Myelinating in the PNS
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What forms a peripheral nerve?
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Formed of groups of axons which are surrounded by myelin, connective tissue sheaths produced by fibrocytes and blood vessels
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What do Schwaan cells develop from?
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The neural crest
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What is the neural crest?
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A group of embryonic cells that separate from the neural plate during neurulation to form spinal and autonomic ganglia and the glial cells of the peripheral nervous system
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What is the endoneurium?
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Inner collection of connective tissue surrounding the axons - collagen fibres spaced out by GAGs, synthesised by widely spaced fibroblasts.
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What is the perineurium?
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The sheath of connective tissue surrounding a bundle (fascicle) of nerve fibres within a nerve. Formed from polygonal perineural cells and type 1 collagen. Cells joined by tight junction and basal lamina
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