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9 Cards in this Set
- Front
- Back
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Which of the following terms describes glyoxal?
a. aliphatic hydrocarbon b. aromatic hydrocarbon c. aldehyde d. alcohol |
the correct answer is "c"
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Paraformaldehyde is a polymer of which of the following?
a. paraldehyde b. formaldehyde c. acetaldehyde d. gluteraldehyde |
the correct answer is "b"
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What amount of commercial stock formaldehyde solution is present in 450mL of 10% formalin?
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45mL of commercial stock formaldehyde solution is present in 450mL of a 10% formalin solution. 10% formalin is a 1:10 dilution of commercial stock formaldehyde solutions.
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Tissue that is well-fixed in 10% neutral buffered formalin (NBF) will demonstrate:
a. good fixation of lipids b. lysis of red blood cells c. stabilization of proteins d. increased enzyme activity |
The correct answer is "c"
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Michel Transport Medium, used for transporting unfixed biopsies, especially for immunofluorescence studies, consists of a buffered solution staurated with:
a. magnesium sulfate b. ammonium sulfate c. N-ethylmaleimide d. citric acid |
The correct answer is "b"
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What is the real percentage of formaldehyde in the 10% formalin solution? |
The real percentage of formaldehyde in the 10% formalin solution is 3.7% -4% as commercial stock solutions of formaldehyde contain 37%-40% formaldehyde; a 1:10 dilution would then give you a 3.7%-4% actual formaldehyde solution. |
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List 3 non-additive fixative ingredients |
1. acetone 2. acetic acid 3. alcohols |
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H&E stained sections show marked lysis of the red blood cells. Fixation in which of the following could cause this:
a. 10% neutral buffered formalin b. Bouin solution c. zinc formalin d. B-5 |
The correct answer is "b" |
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A specimen suspected of gout is brought to the laboratory. The fixative of choice for some of the tissue sections is:
a. Orth solution b. 10% neutral buffered formalin c. absolute alcohol d. Hollande solution |
The correct answer is "c" |
