Boc Questions Flashcards

1
Q

Which of the following would be affected by allowing a urine specimen to remain at room temperature for 3 hours before analysis?

a occult blood

b specific gravity

C.pH

d protein

A

C

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2
Q

MLS ONLY

A 24-hour urine from a man who had no evidence of kidney impairment was sent to the laboratory for hormone determination. The volume was 600 mL, but there was some question as to the completeness of the 24-hour collection. The next step would be to:

a perform the hormone determination, since 600 mL is a normal 24-hour urine volume

b check the creatinine level; if it is <1 g, do the procedure

report the hormone determination in mg/dL in case the specimen was incomplete

check the creatinine level; if it is >1 g, do the procedure

A

D

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3
Q

13 Microalbumin can be measured by a random urine collection. An increased microalbumin is predictive of:

diabetes mellitus

Nephropathy

hypertension

nephrotic syndrome

A

B

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4
Q

14 A patient with uncontrolled diabetes mellitus will most likely have:

pale urine with a high specific gravity

concentrated urine with a high specific gravity

pale urine with a low specific gravity

d dark urine with a high specific gravity

A

A

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5
Q

17

Urine that develops a port wine color after standing may contain:

melanin

Porphyrins

c bilirubin

d urobilinogen

A

B

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6
Q

20 The clarity of a urine sample should be determined:

a using glass tubes only; never plastic

b following thorough mixing of the specimen

C after addition of sulfosalicylic acid

d after the specimen cools to room temperature

A

B

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7
Q

25 A urine specimen collected on an apparentlyealthy 25-year-old man shortly after he finished eating lunch was cloudy but showed normal results on a multiple reagent strip analysis. The most ONLY likely cause of the turbidity is:

fat

b white blood cells

urates

d phosphates

A

D

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8
Q

31

To prepare a solution appropriate for quality control of the refractometer, a technician should use:

a urea with a specific gravity of 1.040

water with a specific gravity of 1.005

sodium chloride with a specific gravity of 1.022

calcium chloride with an osmolarity of 460

directly

A

C

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9
Q

48

Which of the following reagents is used to react with ketones in the urine?

sodium nitroprusside

b acetoacetic acid

c acetone

d beta-hydroxybutyric acid

A

A

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10
Q

50

A reagent strip area impregnated with stabilized, diazotized 2,4-dichloroaniline will yield a positive reaction with:

bilirubin

hemoglobin

c ketones

d urobilinogen

A

A

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11
Q

51

MIS

ONLY

Which of the following factors will not interfere with the reagent strip test for leukocytes?

CAscorbic acid

b formaldehyde

cnitrite

durinary protein level of 500 mg/dL

A

C

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12
Q

52 Excess urine on the reagent test strip can turn a normal pH result into a falsely acidic pH when y which of the following reagents runs into the pH pad?

tetrabromphenol blue

b citrate buffer

glucose oxidase

d alkaline copper sulfate

A

B

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13
Q

58 Microscopic analysis of a urine specimen yields a moderate amount of red blood cells in spite of a negative result for occult blood using a reagent strip. The technologist should determine if this patient has taken:

avitamin C

a diuretic

high blood pressure medicine

d antibiotics

A

A

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14
Q

60

MLS

ONLY

The principle of the reagent strip test for microalbuminuria is:

a diazo reaction

the protein error of indicators

a dye-binding reaction

d the release of hydrogen ions to an indicator

A

C

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15
Q

64

Ammonium sulfate was added to red urine. The urine had a positive reaction for blood, but no RBCs were seen on microscopic examination. After centrifugation the supernatant fluid is red.

The abnormal color is caused by:

a pyridium

b hemoglobin

porphyrins

dmyoglobin

A

D

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16
Q

69

MLS

ONLY

A woman in her ninth monthfpregnancy has a urine sugar which is negative with the urine y reagent strip, but gives a positive reaction with the copper reduction method. The sugar most likely responsible for these results is:

a maltose

galactose

glucose

lactose

A

D

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17
Q

82

Ghost red blood cells are seen in urine that is:

acidic and dilute

alkaline and dilute

c acidic and concentrated

d alkaline and concentrated

A

B

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18
Q

86 Which of the following cells is most likely to be seen in the urine sediment following a catheterization procedure?

squamous epithelial cell

b) urothelial cell

white blood cell

d renal tubular epithelial cell

A

B

19
Q

113 Which of the following crystals is seen in an amber urine with a positive bilirubin?

a ammonium biurate

b cystine

tyrosine

d uric acid

A

C

20
Q

112 Which of the following crystals appear as fine, silky needles?

a cholesterol

b leucine

hemosiderin

dtyrosine

A

D

21
Q

110 Which of the following crystals may be found in acidic urine?

calcium carbonate

calcium oxalate

calcium phosphate

dtriple phosphate

A

B

22
Q

109 Tiny, colorless, dumbbell-shaped crystals were found in an alkaline urine sediment. They most likely are:

a calcium oxalate

calcium carbonate

calcium phosphate

d amorphous phosphate

A

B

23
Q

108 After warming, a cloudy urine clears. This is due to the presence of:

aurates

phosphates

c WBCs

d bacteria

A

A

24
Q

86 Which of the following cells is most likely to be seen in the urine sediment following a catheterization procedure?

squamous epithelial cell

b) urothelial cell

white blood cell

d renal tubular epithelial cell

A

B

25
Q

127 Bacteria are considered significant in the urine sediment when the:

a nitrite is positive

b protein is positive

specimen is cloudy

d leukocytes is positive

A

D

26
Q

128 Which of the following exhibits rapid motility in urine sediment?

a spermatozoa

b Trichomonas vaginalis

c Gardnerella vaginalis

d Enterobius vermicularis

A

B

27
Q

120 Polarized light can often be used to differentiate between:

fibers and mucus clumps

b hyaline and waxy casts

squamous and transitional epithelial cells

d red blood cells and white blood cells

A

A

28
Q

114 Following ingestion of ethylene glycol (antifreeze) numerous crystals are found in the urine.

The shape of these crystals is:

flat with notched corners

boval/dumbbell

coffin-lid

drosettes/rhomboid

A

B

29
Q

168 The normal concentration of proteins in cerebrospinal fluid, relative to serum protein, is:

MLS ONLY

1%

5%-10%

c 25%-30%

d 50%-60%

A

A

30
Q

156 Ketones in urine are due to:

complete utilization of fatty acids

incomplete fat metabolism

high carbohydrate diets

d renal tubular dysfunction

A

B

31
Q

158 Bilirubinuria may be associated with:

a strenuous exercise

increased destruction of platelets

viral hepatitis

d hemolytic anemia

A

C

32
Q

140 A specimen with a negative nitrate reaction and a positive leukocytes reaction that has WBCs, WBC casts, and no bacteria in the sediment will be seen in cases of:

cystitis

pyelonephritis

acute interstitial nephritis

d acute glomerulonephritis

A

C

33
Q

179 Monosodium urate (MSU) and calcium pyrophosphate dehydrate (CPPD) crystals can be distinguished by using a red compensator in a polarizing microscope. When the crystal is aligned with the slow vibration of the compensator, which is true?

MLS ONLY

MSU are blue

bMSU are yellow

CPPD are blue

d corticosteroids are yellow

A

B

34
Q

179 Monosodium urate (MSU) and calcium pyrophosphate dehydrate (CPPD) crystals can be distinguished by using a red compensator in a polarizing microscope. When the crystal is aligned with the slow vibration of the compensator, which is true?

MLS ONLY

MSU are blue

bMSU are yellow

CPPD are blue

d corticosteroids are yellow

A

B

35
Q

180 False-positive results can occur for fecal occult blood due to the ingestion of

a ascorbic acid

b horseradish

cacetaminophen

d blueberries

A

B

36
Q

The chromogen for the fecal occult blood test is:

gum guaiac

b NADH

c o-toluidine

d p-aminocinnamaldehyde

A

A

37
Q

195 The finding of hemosiderin laden macrophage in a CSF sample indicates:

a bacterial infection

viral infection

previous hemorrhage

d traumatic tap

A

C

38
Q

192 An increased IgG index indicates:

MLS

ONLY

antibody response to bacteria

b synthesis of IgG in the CNS

brain tumor

breach of the blood brain barrier

A

B

39
Q

187 A sweat chloride >60 mEq/L (60 mmol/L) is indicative of:

multiple sclerosis

muscular dystrophy

respiratory distress syndrome

dcystic fibrosis

A

D

40
Q

185 Amniotic fluid is tested for the concentration of lamellar bodies. This test determines:

afetal lung maturity (FLM)

b hemolytic disease of the newborn (HDN)

calpha-fetoprotein (AFP)

d trisomy 21

A

A

41
Q

Laboratory characteristics of malabsorption syndrome due to pancreatic insufficiently include:

ancreased fecal fat

b fecal leukocytes

c positive Clinitest®

d fecal occult blood

A

A

42
Q

Pilocarpine iontophoresis refers to the specific process of:

inducing sweat

b separating proteins in CSF

cmeasuring ions in sweat

d measuring pilocarpine in CSF

A

A

43
Q

During sweat collection, a consideration that can result in a falsely high result is:

a high ambient temperature

b evaporation

preparation of area with type 1 water

digh sweat rate

A

B

44
Q

Methods used as screening tests for cystic fibrosis include:

a coulometric Cl measurement

b CI selective electrodes

sweat conductivity

d pilocarpine iontophoresis

A

C