Histology ASCP Exam, Brand New
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An example of an additive is one that contains:
A. Picric acid
B. Acetic acid
C. Ethyl alcohol
D. Acetone - ANSWER✅✅Picric Acid
When compared with tissue fixed in formalin, tissue fixed in zinc-formalin will show:
A. Better ultrastructural preservation
B. Decreased immunoreactivity
C. Increased enzyme activity
D. Superior nuclear detail - ANSWER✅✅Superior nuclear detail
, Microscopic examination of an H&E stained section fixed in formalin shows marked
nuclear bubbling. One most often sees this artifact if the specimen is processed
following:
A. Incomplete fixation
B. Prolonged fixation
C. Microwave fixation
D. Frozen sectioning - ANSWER✅✅Incomplete fixation
Microscopic evaluation of H&E stained sections from a surgically removed small
bowel specimen shows an absence of much of the epithelium in otherwise normal
tissue. This most likely resulted from:
A. Mechanical trauma
B. Delayed fixation
C. Ulceration
D. Poor choice of fixative - ANSWER✅✅Delayed fixation
A specimen of kidney must be shipped to another city for immunofluorescence
studies. The specimen should be placed in:
A. Saline
B. Michel solution
C. Buffered formalin
D. Orth solution - ANSWER✅✅Michel solution
A certain project requires a fixative that contains acetic acid yet stabilizes
erythrocyte membranes. One fixative that could be used is:
A. Zenker solution
B. Bouin solution
C. Gendre solution
D. Hollande solution - ANSWER✅✅Hollande solution
When the microwave oven is used for fixation, the most critical factor is the:
A. Preparation of the formalin solution
B. Use of glass containers
C. Control of the temperature
D. Osmolality of the fixative solution - ANSWER✅✅Control of the temperature
To adequately remove the calcium in a specimen containing areas of
microcalcification, the tissue could be fixed in:
A. Hollande solution
B. NBF
C. B-5 solution
D. Zamboni solution - ANSWER✅✅Hollande solution
What fixative contains copper acetate?
A. Hollande
B. Bouin
,C. Gendre
D. Zamboni - ANSWER✅✅Hollande
A specimen is submitted with the statement that it was fixed in formalin.
Microscopic sections show marked lysis of erythrocytes. This indicates that the
fixative most likely was:
A. Prepared with too much formalin
B. Buffered above neutrality
C. Acidified with acetic acid
D. Not formalin - ANSWER✅✅Acidified with acetic acid
Fixatives are classified as additive because of the:
A. Addition of several chemicals to the solution
B. Addition, or binding of the fixative to tissue proteins
C. Additional reactions occurring with longer fixation
D. Additional reactive tissue sites available for dye binding - ANSWER✅✅Addition,
or binding of the fixative to tissue proteins
Kidney biopsy tissue has been fixed in phosphate-buffered glutaraldehyde for 2
hours and then placed in phosphate buffer solution. If a portion of this tissue is
processed for light microscopy, sections would most likely show:
A. Very poor glomerular preservation
B. Decreased uptake of hematoxylin
C. Lysis of cytoplasmic elements
D. Nonspecific PAS staining - ANSWER✅✅Nonspecific PAS staining
Uric acid crystals are preserved ONLY when tissue is fixed in:
A. Absolute alcohol
B. NBF
C. Orth solution
D. Zamboni solution - ANSWER✅✅Absolute alcohol
Improper preservation of tissue will result if there is:
A. A delay in fixation
B. A rapid penetration of the fixing fluid
C. Prolonged storage following formalin fixation
D. Rapid dehydration, clearing, embedding, and sectioning - ANSWER✅✅A delay in
fixation
A good fixative will:
A. Render cell constituents soluble
B. Minimize differences in tissue refractive indices
C. Protect tissue against alteration during subsequent processing
D. Minimally affect tissue metabolic processes - ANSWER✅✅Protect tissue against
alteration during subsequent processing
The function of methanol in commercial formalin solutions is to:
, A. Retard the polymerization of formaldehyde
B. Prevent the formation of formic acid
C. Stabilize the formalin at a basic pH
D. Permit room temperature storage of formalin - ANSWER✅✅Retard the
polymerization of formaldehyde
In electron microscopy, Zamboni fluid, glutaraldehyde, and osmium tetroxide
function as:
A. Dehydrating agents
B. Clearing agents
C. Embedding media
D. Fixative solutions - ANSWER✅✅Fixative solutions
Tissue will remain unfixed if placed in:
A. Potassium dichromate
B. Sodium borate
C. Osmium tetroxide
D. Zinc chloride - ANSWER✅✅Sodium borate
Bouin's solution is contraindicated for:
A. Small tissue biopsies
B. Tissue intended for subsequent trichrome stains
C. Tissue to be stained by the Feulgen reaction
D. Routine tissue sections - ANSWER✅✅Tissue to be stained by the Feulgen
reaction
Formalin pigment can be removed from tissue sections by treatment with 10%:
A. Hydrochloric acid in 70% alcohol
B. Nitric acid in 70% alcohol
C. Sulfuric acid in 70% alcohol
D. Ammonium hydroxide in 70% alcohol - ANSWER✅✅Ammonium hydroxide in
70% alcohol
Stock neutralized formalin is prepared in the laboratory by storing the solution over
a layer of calcium carbonate. The solution withdrawn from this stock container will:
A. Become acidic
B. Become alkaline
C. Remain neutral
D. Exhibit metachromasia - ANSWER✅✅Become acidic
Microscopic evaluation reveals a poorly stained H&E section of spleen. These results
will be difficult to remedy if the problem is:
A. Poor fixation
B. Improper sectioning
C. Poor staining
D. Incorrect section placement - ANSWER✅✅Poor fixation
Exam Questions with 100% Correct
Verified Answers, All Graded A+,
Latest Expert Premium
Update(2025-2026)|>100%
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An example of an additive is one that contains:
A. Picric acid
B. Acetic acid
C. Ethyl alcohol
D. Acetone - ANSWER✅✅Picric Acid
When compared with tissue fixed in formalin, tissue fixed in zinc-formalin will show:
A. Better ultrastructural preservation
B. Decreased immunoreactivity
C. Increased enzyme activity
D. Superior nuclear detail - ANSWER✅✅Superior nuclear detail
, Microscopic examination of an H&E stained section fixed in formalin shows marked
nuclear bubbling. One most often sees this artifact if the specimen is processed
following:
A. Incomplete fixation
B. Prolonged fixation
C. Microwave fixation
D. Frozen sectioning - ANSWER✅✅Incomplete fixation
Microscopic evaluation of H&E stained sections from a surgically removed small
bowel specimen shows an absence of much of the epithelium in otherwise normal
tissue. This most likely resulted from:
A. Mechanical trauma
B. Delayed fixation
C. Ulceration
D. Poor choice of fixative - ANSWER✅✅Delayed fixation
A specimen of kidney must be shipped to another city for immunofluorescence
studies. The specimen should be placed in:
A. Saline
B. Michel solution
C. Buffered formalin
D. Orth solution - ANSWER✅✅Michel solution
A certain project requires a fixative that contains acetic acid yet stabilizes
erythrocyte membranes. One fixative that could be used is:
A. Zenker solution
B. Bouin solution
C. Gendre solution
D. Hollande solution - ANSWER✅✅Hollande solution
When the microwave oven is used for fixation, the most critical factor is the:
A. Preparation of the formalin solution
B. Use of glass containers
C. Control of the temperature
D. Osmolality of the fixative solution - ANSWER✅✅Control of the temperature
To adequately remove the calcium in a specimen containing areas of
microcalcification, the tissue could be fixed in:
A. Hollande solution
B. NBF
C. B-5 solution
D. Zamboni solution - ANSWER✅✅Hollande solution
What fixative contains copper acetate?
A. Hollande
B. Bouin
,C. Gendre
D. Zamboni - ANSWER✅✅Hollande
A specimen is submitted with the statement that it was fixed in formalin.
Microscopic sections show marked lysis of erythrocytes. This indicates that the
fixative most likely was:
A. Prepared with too much formalin
B. Buffered above neutrality
C. Acidified with acetic acid
D. Not formalin - ANSWER✅✅Acidified with acetic acid
Fixatives are classified as additive because of the:
A. Addition of several chemicals to the solution
B. Addition, or binding of the fixative to tissue proteins
C. Additional reactions occurring with longer fixation
D. Additional reactive tissue sites available for dye binding - ANSWER✅✅Addition,
or binding of the fixative to tissue proteins
Kidney biopsy tissue has been fixed in phosphate-buffered glutaraldehyde for 2
hours and then placed in phosphate buffer solution. If a portion of this tissue is
processed for light microscopy, sections would most likely show:
A. Very poor glomerular preservation
B. Decreased uptake of hematoxylin
C. Lysis of cytoplasmic elements
D. Nonspecific PAS staining - ANSWER✅✅Nonspecific PAS staining
Uric acid crystals are preserved ONLY when tissue is fixed in:
A. Absolute alcohol
B. NBF
C. Orth solution
D. Zamboni solution - ANSWER✅✅Absolute alcohol
Improper preservation of tissue will result if there is:
A. A delay in fixation
B. A rapid penetration of the fixing fluid
C. Prolonged storage following formalin fixation
D. Rapid dehydration, clearing, embedding, and sectioning - ANSWER✅✅A delay in
fixation
A good fixative will:
A. Render cell constituents soluble
B. Minimize differences in tissue refractive indices
C. Protect tissue against alteration during subsequent processing
D. Minimally affect tissue metabolic processes - ANSWER✅✅Protect tissue against
alteration during subsequent processing
The function of methanol in commercial formalin solutions is to:
, A. Retard the polymerization of formaldehyde
B. Prevent the formation of formic acid
C. Stabilize the formalin at a basic pH
D. Permit room temperature storage of formalin - ANSWER✅✅Retard the
polymerization of formaldehyde
In electron microscopy, Zamboni fluid, glutaraldehyde, and osmium tetroxide
function as:
A. Dehydrating agents
B. Clearing agents
C. Embedding media
D. Fixative solutions - ANSWER✅✅Fixative solutions
Tissue will remain unfixed if placed in:
A. Potassium dichromate
B. Sodium borate
C. Osmium tetroxide
D. Zinc chloride - ANSWER✅✅Sodium borate
Bouin's solution is contraindicated for:
A. Small tissue biopsies
B. Tissue intended for subsequent trichrome stains
C. Tissue to be stained by the Feulgen reaction
D. Routine tissue sections - ANSWER✅✅Tissue to be stained by the Feulgen
reaction
Formalin pigment can be removed from tissue sections by treatment with 10%:
A. Hydrochloric acid in 70% alcohol
B. Nitric acid in 70% alcohol
C. Sulfuric acid in 70% alcohol
D. Ammonium hydroxide in 70% alcohol - ANSWER✅✅Ammonium hydroxide in
70% alcohol
Stock neutralized formalin is prepared in the laboratory by storing the solution over
a layer of calcium carbonate. The solution withdrawn from this stock container will:
A. Become acidic
B. Become alkaline
C. Remain neutral
D. Exhibit metachromasia - ANSWER✅✅Become acidic
Microscopic evaluation reveals a poorly stained H&E section of spleen. These results
will be difficult to remedy if the problem is:
A. Poor fixation
B. Improper sectioning
C. Poor staining
D. Incorrect section placement - ANSWER✅✅Poor fixation
