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Neuro Block > Histology > Flashcards

Flashcards in Histology Deck (10):
1

Name the glial cells?

astrocytes, oligodendrocytes, schwann cells, ependymal cells, satellite cells of ganglia

2

What are Ependymal cells

columnar shaped cells that line the spinal cord and ventricle -> have cilia on apical surface to aid CSF flow, NOT epithelial cells - lack a basal laminar

3

What are Nissl bodies?

granular body of rough ER and ribosomes in the cell body of neurons - site of protein systems

4

What are astrocytes, what do they do?

glial cells. Passive actions: neurotransmitter uptake and degradation, K homeostasis, neuronal energy supply, maintainance of BBB, Injury response and recovery. Active roles: modulation of blood flow (constriction of capillaries), excitable (ca transients) so modulate neuronal function

5

What initiates glial cell excitability?

calcium waves triggers by neurotransmitters, trauma, spontaneous, inflammatory mediators

6

What are oligodendrocytes? what do they do?

Glial cells that wrap around and insulate parts of multiple axons in the CNS

7

What are Schwann cells and what do they do?

glial cells that act like oligodendrocytes in the PNS but wrap around and insulate a single axon

8

What are microglia?

Phagocytic cells of the CNS - constantly survey the CNS to ensure synapses are working ok and respond to injury and play a role in development

9

What are the layers of collagenous tissue within a nerve?

single axon+schwann cell are covered by endoneurium, multiple fibres are surrounded by perineurium making a fasicle, multiple fascicles are surrounded by epineurium = peripheral nerve

10

What is a ganglia? what are the 2 types?

collection of cell bodies of neurons outside of the CNS, Sensory and autonomic ganglia