L3M4R - HISTOPATH AND MEDTECH LAWS Exam Questions with Verified Solutions 100% Verified

L3M4R - HISTOPATH AND MEDTECH LAWS Exam Questions with Verified
Solutions 100% Verified
Study online at https://quizlet.com/_i2twz4
1. 1. All processes are done in an automatic tissue processor, EXCEPT:
A. Fixation
B. Dehydration
C. Impregnation
D. Embedding: D. Embedding
2. 2. The AUTOTECHNICON is an automatic tissue processor. The last container
through which the surgical tissue sections pass through contains:
A. Formalin
B. Alcohol
C. Paraffin
D. Acetone: C. Paraffin
3. 3. All of the following are good characteristics of a fixing fluid, EXCEPT:
A. It must be cheap, stable and safe to handle.
B. It must inhibit bacterial decomposition and autolysis.
C. It must be isotonic, causing minimal physical and chemical alteration of the
cells.
D. It must make cellular components sensitive to subsequent processing.: D. It
must make cellular components SENSITIVE to subsequent processing.
4. 4. The amount of the fixing fluid should be approximately:
a. 5-10 times the volume of the specimen
b. 10-20 times the volume of the specimen
c. 20-30 times the volume of the specimen
d. 40-50 times the volume of the specimen: b. 10-20 times the volume of the specimen
5. 5. All of the following are micronanatomical fixatives, EXCEPT:
a. 10% formalin
b. bouin's solution
c. zenker's solution
d. flemming's fluid: d. flemming's fluid
6. 6. Nuclear fixatives are those which preserves the nuclear structures (e.g.,
chromosomes). They usually contain _____ as their primary component due to
its affinity for nuclear chromatin. They have a pH of 4.6 or less.


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A. Osmium tetroxide
B. Nitric acid
C. Trichloroacetic acid
D. Glacial acetic acid: D. Glacial acetic acid
7. 7. Cytoplasmic fixatives are those that preserves cytoplasmic structures in
particular. They must never contain glacial acetic acid which destroys mitochon-
dria and Golgi bodies of the cytoplasm. They have a pH of more than 4.6. All of
the following are cytoplasmic fixatives, except:
A. Helly's fluid
B. Zenker's fluid
C. Regaud's fluid
D. Orth's fluid: B. Zenker's fluid
8. 8. All of the following are metallic fixatives, EXCEPT:
A. Zenker's fluid
B. Helly's solution
C. Regaud's solution
D. Carnoy's fluid: D. Carnoy's fluid
9. 9. All of the following are mercurial fixatives, EXCEPT:
A. B-5 fixative
B. Zenker's fluid
C. Orth's fluid
D. Hedenhain's fluid: C. Orth's fluid
10. 10. These fixatives are recommended for glycogen fixation:
A. Aldehyde fixatives
B. Mercurial fixatives
C. Alcoholic fixatives
D. Chromate fixatives: C. Alcoholic fixatives
11. 11. Most widely used fixative for electron microscopy:
A. Mercurial fixatives
B. Picric acid fixatives



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C. Glacial acetic acid
D. Osmium tetroxide fixatives: D. Osmium tetroxide fixatives
12. 12. Fixative for the preservation of fats:
A. Helly's fluid
B. Zenker's fluid
C. Formalin
D. Newcomer's fluid: C. Formalin
13. 13. Best fixative for the nervous system:
A. Formalin
B. B-5 fixative
C. Helly's fluid
D. Regaud's fluid: A. Formalin
14. 14. It is added as a preservative to formaldehyde. This will prevent its decom-
position to formic acid or precipitation to paraformaldehyde.
A. Butanol
B. Ethanol
C. Methanol
D. Acetone: C. Methanol
15. 15. Formaldehyde is usually buffered at pH 7 with _____ buffer.
A. Citrate
B. Bicarbonate
C. Carbonic acid
D. Phosphate: D. Phosphate
16. 16. Formaldehyde fumes are irritating to the nose and eyes and may cause:
A. Allergic rhinitis
B. Sinusitis
C. Excessive lacrimation
D. AOTA: D. AOTA
17. 17. In tissues containing much blood (e.g., spleen), unbuffered formalin
leads to the formation of dark brown artifact pigment granules. These pig-
ments may be removed with: