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8 Cards in this Set
- Front
- Back
Which of the following statements is correct regarding components of a CNS neuron?
(Where is nissl substance not located?) |
The Nissl substance is not present in the axon hillock.
Axon hillock and axoplasm |
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Which type of brain cell is identified by the arrow?
It has feet wrapping around blood vessels and perineural feet. |
Astrocyte
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What is the function of the perivascular feet? |
Transfer metabolites among neurons and other cells. |
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A virus has damage the myelin sheaths surround the axons of the neurons supplying the legs. How would electrical impulses be changed? |
Electrical impulses in these nerves would slow down. |
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A virus has damage the myelin sheaths surround the axons of the neurons supplying the legs. How would such viral injury to this myelin be manifested in a patient? |
Patient would experience altered sensation for temperature in the legs. Alternative: patient would develop weakness of the leg.
Pain and temperature usually unmyelinated fibers |
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Which of the following cell types is most likely involved in a tumor originating from the myelin forming cells of the CNS? |
Oligodendroglia |
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A young Pakistanian boy arrives in the US on vacation with his parents. One day after arrival he develops a rapidly progressive quadriparesis and you diagnose him with polio. You explain to his mother that the polio virus reached his CNS by....? |
Retrograde axonal transport |
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Which of the following is true?
Multipolar neurons have many axons Sensory neurons of the DRG are unipolar Golgi type I neurons have very short axons Principal cells are golgi type II neurons Pseudo-unipolar neurons sub-serve sensation |
Pseudo-unipolar neurons sub-serve sensation |