Neuro lecture 1.txt

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kepling
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71651
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Neuro lecture 1.txt
Updated:
2011-03-08 17:42:07
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Neuro lecture
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Neuro lecture 1
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  1. What is funiculus and where is it located?
    • Bundle of white matter
    • CNS
  2. What is lemniscus?
    • ribbons of white matter
    • CNS
  3. What are nissel bodies and where are they located?
    • stacks of reticulum
    • located in the stroma of neurons
  4. What is the most preferred site of neuronal synapse? Axons, Dendrites, Soma
    Dendrites
  5. What are the three types of Neurons and their functions?
    • 1) Pseudounipolar: Sensory, posterior root
    • 2) Bipolar: visual, olfactory, auditory, vestibular
    • 3) Multipolar: motor
  6. What is the glia limitans?
    The contact between the podocytes of the astrocytes and the Pia Mater
  7. What are two types of astrocytes?
    • 1) Protoplasmic: gray matter
    • 2) Fibrous: white matter
  8. What is a radial glia?
    Astrocyte that provides a migration pathway for new neurons
  9. What do Astrocytes form when there is an injury?
    Glial Scar (fluid filled area surrounded by podocyte extensions)
  10. Do astrocytes regulate intracellular or extracellular environment?
    Extracellular
  11. What are three stages of microglia?
    • 1) Ramified
    • 2) bushy
    • 3) Phagocytic
  12. What cells myelinate the CNS and PNS?
    • CNS : Oligodendrocyte
    • PNS: Schwann cells
  13. What is the cause of traumatic neuroma?
    When an axon is damaged and the distance to reach a Von Bungner band is >15mm
  14. Which produces growth factors: schwann cells or oligos?
    Schwann Cells: This is why a cell can regrow in the PNS and not in the CNS
  15. What is Wallerian Degeneration?
    • Myelin fragmentation due to injury
    • Macrophage, microglia, cleaning of debris
  16. What mediates docking between the SV and plasma membrane?
    Calcium
  17. What type of pore is formed after docking of SV and plasma membrane?
    Fusion Pore
  18. What is the NT in the CNS?
    Glutamate
  19. What is the primary NT in the PNS?
    Ach

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