Boc Questions Flashcards
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
C
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
D
13 Microalbumin can be measured by a random urine collection. An increased microalbumin is predictive of:
diabetes mellitus
Nephropathy
hypertension
nephrotic syndrome
B
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
17
Urine that develops a port wine color after standing may contain:
melanin
Porphyrins
c bilirubin
d urobilinogen
B
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
B
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
D
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
C
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
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
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
C
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
B
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
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
C
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
D
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
D
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
B
