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While performing an analysis of a baby's urine, the laboratorian notices the specimen has a
"mousy" odor. Of the following substances that may be excreted in urine, the one that most
characteristically produces this odor is
A. Phenylpyruvic acid
B. Acetone
C. Coliform bacilli
D. Porphyrin A
An ammonia-like odor is characteristically associate with urine from patients who
A. Are diabetic
B. Have hepatitis
C. Have an infection with Proteus spp
D. Have a yeast infection C
Urine that develops a port wine color after standing may contain
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A. Melanin
B. Porphyrins
C. Bilirubin
D. Urobilinogen B
Acid urine that contains hemoglobin will darken on standing due to the formation of
A. Myoglobin
B. Sulfhemoglobin
C. Methemoglobin
D. RBCs C
Urine from a 50-year old man was noted to turn dark red on standing. This change is caused by
the presence of
A. Glucose
B. Porphyrins
C. Urochrome
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D. Creatinine B
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
Milky urine from a 24 year old woman would most likely contain
A. Spermatozoa
B. May WBCs
C. RBCs
D. Bilirubin B
A brown-black urine would most likely contain
A. Bile pigment
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B. Porphyrin
C. Melanin
D. Blood cells C
The yellow color of urine is primarily due to
A. Urochrome pigment
B. Methemoglobin
C. Bilirubin
D. Homogenistic acid A
Red urine may be due to
A. Bilirubin
B. Excess urobilin
C. Myoglobin
D. Homogenistic acid C