7TH PRETEST Flashcards
Formalin pigment can be removed from tissue sections by treatment with: *
a) 10% hydrochloric acid in 70% alcohol
b) 10% nitric acid in 70% alcohol
c) 10% sulfuric acid in 70% alcohol
d) 10% ammonium hydroxide in 70% alcohol
d) 10% ammonium hydroxide in 70% alcohol
To prevent the formation of formalin pigment in tissues, formalin should be: *
a) heated
b) cooled
c) buffered
d) acidified
c) buffered
Relating to nerve cells, chromatolysis refers to the loss of: * a) axons b) Nissl substance C) dendrites d) myelin
b) Nissl substance
The most consistently reliable technique for demonstrating fungi in tissues is the: *
a) PAS
b) Gridley method for fungi
c) Gomori methenamine silver (GMS)
d) Ziehl-Neelsen
c) Gomori methenamine silver (GMS)
The recommended fixative for tissue suspected of containing spirochetes is: *
a) 10% neutral buffered formalin
b) Bouin solution
c) Zenker solution
d) Helley fluid
a) 10% neutral buffered formalin
Pigment that is present on the surface of cells but not within them is probably: *
a) endogenous
b) hematogenous
c) hepatogenous
d) artifact
d) artifact
Tumors of the adrenal medulla are called pheochromocytomas and to affect their demonstration should be fixed in: * a) 95% alcohol b) Orth's fluid C) B-5 solution d) 10% buffered fomalin
b) Orth’s fluid
Nissl substance can be demonstrated with which of the following stains: *
a) thionin and cresyl echt violet
b) eosin and phloxine
c) silver nitrate and gold sublimate
d) orange G and methyl blue
a) thionin and cresyl echt violet
Permitting slides to remain in alcohols after the OG or EA counterstains:
a. will cause removal of the cytoplasmic color
b. should be avoided to prevent cell dehydration
c. has no effect on staining quality
d. allows adequate hydration of cells
a. will cause removal of the cytoplasmic color
Individual virus particles cannot be seen by light microscopy, but can be visualized by: *
a) phase microscopy
b) polarizing microscopy
c) electron microscopy
d) fluorescence microscopy
c) electron microscopy
A technique for demonstrating calcium, wherein sections immersed in silver nitrate solution are exposed to bright light, is the: *
a) Schmorl
b) von Kossa
c) dopa oxidase
d) alizarin red S
b) von Kossa
The term “argentaffin” literally refers to a reaction wherein cells have the ability to reduce a salt of this metal: *
a) chromium
b) lithium
c) copper
d) silver
d) silver
The point of contact between an axon of one neuron and the dendrite of another neuron is called: *
a) link
b) synapse
c) attachment
d) contact
b) synapse
The second largest portion of the brain is the: *
a) cerebrum
b) cerebellum
c) pons
d) medulla
b) cerebellum
A component of nerve tissue that can be demonstrated by gold and silver impregnation techniques is: * a) neurofibrils b) Nissl substance C) dendrites d) myelin
a) neurofibrils
The pigment commonly known as “wear and tear pigment” or “brown atrophy” is: *
a) hemofuchsin
b) ceroid
c) lipofuchsin
d) hemosiderin
c) lipofuchsin
The largest portion of the brain is the: * a) medulla b) midbrain C) cerebellum d) cerebrum
d) cerebrum
Lung sections showing granulomatous inflammation on H&E stained sections are commonly stained with at least two techniques to demonstrate the presence of: *
a) fungi or acid-fast organisms
b) fibrosis or acid-fast organisms
c) fungi or muscle
d) fungi or fibrosis
a) fungi or acid-fast organisms
The nerve process carrying electrical impulses away from the cell body is called an: * a) neuron b) dendrite C) synapse d) axon
d) axon
Select the example of an exogenous pigment: *
a) argentaffm
b) melanin
c) chromaffin
d) carbon
d) carbon
Cells and fibers comprising specialized connective tissue of the central nervous system are: *
a) oocytes
b) chondrocytes
c) neuroglia
d) phagocytes
c) neuroglia
Pigments in this organ are considered to be some of the most difficult to differentiate on routine staining: *
a) lung
b) liver
c) spleen
d) kidney
b) liver
The nerve process carrying nerve impulses toward the cell body nucleus is called an: *
a) dendrite
b) axon
c) neuron
d) ganglion
a) dendrite
The fixative of choice for demonstration of urate crystals is: *
a) neutral buffered formalin
b) absolute alcohol
c) Bouin’s
d) Zenker’s
b) absolute alcohol
The cytotechnologist informs you that there is no staining color present in the slides from the Papanicolaou run. The most likely cause is: *
a. exhausted stains
b. insufficient staining time
c. prolonged time in clearing reagent
d. incomplete removal of fixative prior to staining
a. exhausted stains
