Term
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Definition
astrocytes
oligodendrocytes
micorglia |
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Term
|
Definition
astrocytes
oligodendricytes |
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Term
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Definition
| cell bodies of neurones and glial cells surrounded by pale neuropil |
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Term
|
Definition
| meshwork of cell processes and axons |
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Term
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Definition
| myelinated axons and macroglia |
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Term
| 3 main structures of neurones |
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Definition
dendrites,
axon,
cell body |
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Term
| do neurones in the CNS regenerate? |
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Definition
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Term
| Do neurones in the PNS regenerate? |
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Definition
| ... have limited regenerative capacity |
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Term
| Why are neurones highly susceptible to injury? |
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Definition
| They have a high metabolic rate and a high energy demand but little energy reserve capacity |
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Term
| main cell involved in repair of neurones and mop up neurotransmitters = |
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Definition
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Term
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Definition
| atsrocyte foot processes attached to bvs |
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Term
| astrocytes play important roles in |
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Definition
CNS development,
structure,
physiology,
protection
and pathological responses |
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Term
| main cell involved in repair in the CNS = |
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Definition
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Term
| during repair astrocytes produce abundant filamentous processes called... |
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Definition
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Term
| function of astrogliosis = |
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Definition
| = to fill interstitial spaces left by dead cells or to attempt to wall off injurious agents |
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Term
| astrocytes can secrete... |
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Definition
| ...GFs, cytokines and chemokines |
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Term
| astrocytes can express... |
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Definition
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Term
| role of oligodendrocytes: |
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Definition
1. regulation of the perineuronal enviro.
2. myelination of axons |
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Term
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Definition
| = oligodendrocytes lying adjacent to neurones or bvs in the GM |
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Term
| increased no. of oligodendrocytes around injured neurones = |
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Definition
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Term
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Definition
| gaps between sheaths of myelin |
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Term
| injury to oligodendrocytes = |
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Definition
| = loss of myelin sheaths/demyelination = reduced AP conduction speed |
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Term
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Definition
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Term
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Definition
1. CNS development (remodelling and maturation of the CNS involves removal of cells by microglia)
2. immune responses, inflam and degenerative change |
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Term
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Definition
| microglia and blood derived macro in CNS |
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Term
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Definition
| ciliated cuboidal/columnar cell lining ventricles |
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Term
| function of ependymal cells |
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Definition
1.involved in secretion, movement and absorption of CSF
2. regulatory function (permit passage of molecules to and from CSF and neuropil) |
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Term
| can ependymal cells regenerate? |
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Definition
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Term
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Definition
| lateral ventricles - 3rd ventricle - mesencephalic aquaduct- 4th ventricle - (small flow into spinal canal) // lateral apertures -subarachnoid space - absorbed by arachnoid villi |
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Term
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Definition
1. provide nutrients
2. remove waste products
3. protects against trauma |
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Term
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Definition
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Term
| subarachnoid space contains... |
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Definition
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Term
| each schwann cell in PNS forms a... |
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Definition
| ...single internode/myelin sheath region |
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Term
| endoneurial fibroblasta = |
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Definition
| supporting cells (may have phagocytic properties) |
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Term
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Definition
| fibroblasts within collagen, surrounding nerve bundles |
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Term
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Definition
| fibroblasts, adipocytes, mast cells |
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Term
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Definition
| layer of astrocytic processes and fibres forming a layer adjacent to pia mater covering brain and s.c. |
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