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8 Cards in this Set

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  • 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

Which type of brain cell is identified by the arrow?



It has feet wrapping around blood vessels and perineural feet.

Astrocyte



What is the function of the perivascular feet?

Transfer metabolites among neurons and other cells.

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.

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

Which of the following cell types is most likely involved in a tumor originating from the myelin forming cells of the CNS?

Oligodendroglia

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

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