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Lab CE Practice Exams > 2 > Flashcards

2 Flashcards

1
Q

What is the defining characteristic of Trichophyton rubrum in a lactophenol cotton blue mount?

A

microconidia arranged along the hyphal strands in a “birds on a fence” configuration

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2
Q

What is the defining characteristic of Trichophyton verrucosum in a lactophenol cotton blue mount?

A

antler hyphae and “string bean” macroconidia

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3
Q

What are engineering controls?

A

devices that protect the worker from the hazard of exposure that are not considered PPE (sharps containers, biosafety cabinets, splash guards, etc.)

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4
Q

Which Lewis blood group system phenotype usually produces anti-Lea?

A

Le(a-b-)

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5
Q

What is the formula for a manual WBC count?

A

[cells counted (or avg. of both sides) x dilution factor] / (# squares counted x 0.01 x area of each square)

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6
Q

What kind of gene initiates DNA synthesis, promotes cell division, and inhibits cell death?

A

proto-oncogenes

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7
Q

Cystine-tellurite blood agar is recommended for the isolation of what organism?

A

Corynebacterium diphtheriae

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8
Q

What casts might be present in the urine of a healthy individual following strenuous exercise?

A

granular and/or hyaline

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9
Q

Plasma exchange is the current treatment for what condition?

A

thrombotic thrombocytopenic purpura (TTP)

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10
Q

What organism causes “lumpy jaw”?

A

Actinomyces israelii

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11
Q

A slanted ESR tube may have what effect on the ESR test?

A

may falsely increase the results

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12
Q

Which dematiaceous fungus produces conidia in clusters?

A

Exophiala sp.

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13
Q

What is the primary mechanism responsible for glomerular filtration?

A

hydrostatic differential in glomerular tufts

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14
Q

Antigen processing is primarily accomplished by what cell type?

A

macrophages

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15
Q

Production of H2S, citrate +, and the decarboxylation of arginine, lysine, and ornithine, are results that presumptively ID which organism?

A

Salmonella sp.

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16
Q

In an antibody titer, if the reaction in tubes 5-7 are stronger than those in tubes 1-4, what has happened?

A

prozone reaction

17
Q

Which analyte measurement is used to detect early nephropathy in diabetics?

A

microalbumin

18
Q

What kind of pathogen is Blastomyces dermatitidis?

A

obligate

19
Q

Estrogen and progesterone markers are most commonly used to provide prognostic information about which cancer?

A

breast cancer

20
Q

What marrow cell has highly granular basophilic cytoplasm but does not show nuclear lobation?

A

mast cell

21
Q

What three processes are inhibited by insulin?

A

gluconeogenesis, lipolysis, and glycogenolysis

22
Q

Define gluconeogenesis.

A

formation of glucose from non-carbohydrates

23
Q

Define lipolysis.

A

the release of non-esterified fatty acids (NEFAs) from triglycerides

24
Q

Define glycogenolysis.

A

conversion of glycogen back to glucose

25
Q

A Gram stain on a sputum sample shows Gram= diplococci; biochemical testing shows the organism to be oxidase + and carbohydrate degradation inactive. What is the presumptive ID?

A

Moraxella catarrhalis

26
Q

Which hormones increase plasma glucose concentration by converting glycogen to glucose?

A

glucagon and epinephrine

27
Q

What anaerobic organism produces large amounts of succinic acid?

A

Actinomyces israelii

28
Q

Which 24-hour urine assay is the best single screening test for pheochromocytoma?

A

metanephrines

29
Q

What structural defect would NOT cause hemoglobinopathies?

A

deletion of a globin chain

30
Q

What is the age range most common for scrofula infections?

A

5-10 years old

31
Q

How long do healthy neutrophils live in the peripheral blood of an adult?

A

7-8 hours

32
Q

Which organism produces “pipe cleaner” or “test tube brush” motility?

A

Erisypelothrix rhusiopathiae

33
Q

The gene loci for the alpha globin chains are adjacent to the locus for what other globin chain?

A

zeta

34
Q

Define congestive heart failure.

A

left ventricular dysfunction due to aging, hypertension, atherosclerosis, or muscle damage from an AMI or multiple AMIs

35
Q

Define ischemia.

A

inadequate blood supply that decreases the availability of oxygen

36
Q

Define infarction.

A

area of tissue death resulting from lack of oxygen

37
Q

Define angina.

A

chest pain due to inadequate oxygen supply to the heart myocardium

Lab CE Practice Exams (10 decks)

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