Nerve Flashcards
Nissl substance is present in…
neurons
A neuron is a…
nerve cell
Nissl substance is composed of..
rough endoplasmic reticulum
Nissl substance is demonstrated by which stain?
cresyl echt violet
Astrocytes are demonstrated by which stain?
Cajal
The preferred fixatives for sections to be stained with the Cajal technique is:
formalin ammonium bromide
Sections to be stained for myelin should be cut at:
10-15 microns
In the Holzer method, glial fibers are stained with:
crystal violet
A method that can be used to demonstrate senile plaques is:
Bielschowsky
Neuron cell bodies are primarily found in:
grey matter in the CNS
Spinal cord is an excellent control for which of the following techniques:
a. Bielschowsky
b. Weil
c. Holzer
d. Bodian
Weil. Spinal cords are excellent for myelin stains, as it shows sharp differentiation b/w grey and white matter.
The preferred fixative for the Bodian method is:
NBF
Glial fibers are stained blue by:
phosphotungstic acid-hematoxylin (PTAH)
Macroscopic evaluation can be used to judge the quality of which stains?
Weil and LFB. Myelin stains you can easily distinguish the different matters with the naked eye.
Which two solutions are used for differentiation in the Weil procedure?
Ferric ammonium sulfate and borax ferricyanide
Which reagents are contained in the staining solution used in the Weil method?
Ferric ammonium sulfate and hematoxylin
Which methods are used for demonstrating nerve cell processes?
Bodian, Holmes, Bielschowsky, and Sevier Munger.
T/F: Functionally, the autonomic nervous system is under voluntary control.
False.
T/F: A neuron has 1 axon.
True. They have on axon but can have many dendrites.
T/F: Nissl substance is composed of clumps of DNA.
False. Nissl substance is composed of rough endoplasmic reticulum which is RNA.
T/F: In the central nervous system, myelin is made up by the astrocytes.
False. Myelin is made up of oligodendria.
T/F: Ependymal cells are epithelial cells.
True.
T/F: Myelin is responsible for the color of white matter.
True.
Stains for the Nissl substance can be used to identify neurons in tumors.
True.