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36 Cards in this Set
- Front
- Back
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What gives rise to Neuroblasts?
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Neural tube epithelium.
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What gives rise to Astrocytes and Oligodendrocytes (the Macroglia)?
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Neural tube epithelium.
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What gives rise to Ependymoblasts?
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Neural tube epithelium.
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What gives rise to Microglia?
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Neural tube epithelium.
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What gives rise to Sensory ganglia?
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Neural Crest Cells.
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What gives rise to Motor Ganglia?
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Neural Crest Cells.
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What gives rise to Schwann Cells?
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Neural Crest Cells.
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What gives rise to Chromaffin cells of Adrenal Medulla?
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Neural Crest Cells.
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What gives rise to Melanocytes?
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Neural Crest Cells.
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What gives rise to Head Mesenchyme?
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Neural Crest Cells.
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A characteristic of an oligodendrocyte is?
a. perivascular feet b. they prodce myelin c. are found only in gray matter d. have no phagocytic ability |
B
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Neural crest cells give rise to all of the following except?
a. schwann cells b. dorsal root ganglia c. lining of the ventricles of the brain d. melanocytes |
C
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All of the following is true of oligodendrocytes except?
a. exist as satellite cells in the gray matter b. produce myelin in the CNS c. may line up alongside blood vessels d. have phagocytic capability |
D
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Neual crest cells give rise to all of the following except?
a. schwann cells b. astrocytes c. adrenal medulla d. dorsal root ganglia |
B
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Which of the following is not true of oligodendrocytes?
a. exist as satellite cells in the gray matter b. produce myelin in the CNS c. may line up alongside blood vessels d. large and star shaped |
D
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A characteristic of astrocytes is
a. peivascular feet b. they produce myelin c. they are found only in gray matter d. have no phagocytic ability |
A
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Neurons in the CNS arise from:
a. neural tubular epithelium b. neural crest cells c. neuralglia d. ependymal cells |
A
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All of the following are characteristics of Schwann cells, except?
a. produce myelin in the CNS & PNS b. can phagocytize injured neuron processes c. produce myelin for one nerve process at a time d. contribute to the formation of the nodes of Ranvier |
A
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All of the following develop from neural crest cells except?
a. the adrenal medulla b. post-ganglionic autonomic neurons c. dorsal root ganglion neurons d. oligodendrocytes |
D
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All of these are categorized as true glial cells except?
a. oligodendrocytes b. fibrous astrocytes c. microglia d. protoplasmic astrocytes |
C
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Which of the following have perivascular feet?
a. perineuronal oligodendrocytes b. interfascicular oligodendrocytes c. fibrous astrocytes d. protoplasmic astrocytes |
C
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Ependymal cells:
a. line outer surface of cerebral cortex b. are phagocytic cells c. help form choroid plexus d. produce myelin |
C
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Neurotubular epithelium gives rise to all of these except?
a. neurons in the cerebral cortex b. dorsal root ganglion c. neuroglia d. ependymal cells |
B
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All of the following are characteristics of Schwann cells except?
a. produce myelin in the CNS & PNS b. can phagocytize injured neuron processes c. produce myelin for one nerve process at a time d. contribute to the formation of nodes of Ranvier |
A
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All of these develop from neural crest cells except?
a. the adrenal medulla b. post-ganglionic autonomic neurons c. schwann cells d. astrocytes |
D
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All of these are categorized as true glial cells, except?
a. oligodendrocytes b. fibrous astrocytes c. microglia d. protoplasmic astrocytes |
C
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Which of the following have perivascular feet?
a. perineuronal oligodendrocytes b. interfascicular oligodendrocytes c. fibrous astrocytes d. protoplasmic astrocytes |
C
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This lamina is associated with sensory impulses.
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Alar lamina (plate)
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This lamina is associated with motor neurons.
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Basal lamina (plate)
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Increasing nerve fiber diameter will do what to the conduction velocity?
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It will increase it.
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What is the largest and most numerous glial cell?
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The Astrocytes.
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Which type of astrocyte is found mostly in the gray matter?
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Protoplasmic.
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What are the functions of astrocytes?
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1. Ensure stability of CNS environment (K+, glutamate and GABA regulation)
2. Guide axon elongation 3. Contribute to BBB 4. Respond to neuronal injury by laying down numerous fliamentous components (fibrilar gliosis) 5. Form glial scars |
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Most primary brain tumors are ___________.
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Astrocytomas
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Oligodendrocytes are more numerous in white/gray matter.
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White
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This type of oligodendrocyte is responsible for myelin production.
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Interfasicular.
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