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MLT ASCP Practice/75 Questions: Urinalysis & Body Fluids 100% Verified Answers
MLT ASCP Practice/75 Questions: Urinalysis & Body Fluids 100% Verified Answers
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MLT ASCP Practice/75 Questions: Urinalysis &Body Fluids 100% Verified Answers
Quiz :The indicator(s) used in the pH test region of the chemical reagent strips
for urine is/are: (Choose ALL correct answers)
A. methyl red
B. methyl blue
C. bromothymol blue
D. bromothymol red - Answer :A & C;
The indicator(s) used in the pH test region are methyl red and bromothymol
blue. Typically on most chemical reagent strips for urine pH, with an increase in
urinary pH, the indicators bromothymol blue and methyl red, changes from
orange to green and blue.
Quiz :Which of the following is not a standard method for measuring the
specific gravity of urine:
A. Urine reagent strips
B. Freezing point depression
C. Refractometry
D. Hydrometry - Answer :B;
Osmolality can be measured by freezing point depression, but not specific
gravity as specified in this question. The other methods are used to measure
specific gravity in urine samples.
Quiz :The normal range for urine pH is:
A. 4.6 to 8.0
B. 5.0 to 6.0
C. 5.5-6.6
D. 7.35-7.45 - Answer :A;
Normal urine pH varies from 4.6 to 8.0. After meals, urine becomes more
alkaline due to gastric acid secretion (alkaline tide). At night due to shallow
breathing, it becomes more acid. A high meat diet results in a more acid urine
than a vegetarian diet, due to excretion of phosphates and sulfates.
Quiz :Which two of the following crystalline elements are found in acid urine:
A. Cystine
,B. Triple phosphate
C. Calcium phosphate
D. Tyrosine - Answer :A & D;
Crystals and sediment found in acid urine include: cystine, leucine, calcium
oxalate, sodium urate, sulfonamide, tyrosine, uric acid, and amorphous urates.
Quiz :False-positive tests for protein on a urine reagent strip may be caused
by: (Choose ALL of the correct answers)
A. Bacterial contamination
B. Urine that has remained at room temperature for an extended period of
time
C. Alkaline medication
D. Ascorbic acid - Answer :A-C;
Bacterial contamination, urine that has remained at room temperature for an
extended period of time, and the presence of alkaline medication are all
factors which can cause false positives on the protein pad of a urine reagent
strip.
Quiz :Bence-Jones proteinuria can be seen in all of the following conditions
except:
A. Amyloidosis
B. Nephrotic syndrome
C. Multiple myeloma
D. Macroglobulinemia - Answer :B;
Bence-Jones proteins are monoclonal light chains excreted in the urine, seen
with multiple myeloma, and other neoplasms of lymphoid cells. Small amounts
can be missed by urine dipsticks, which are more sensitive to albumin than
globulins. They are best detected by urine protein electrophoresis,
immunoelectrophoresis, or immunofixation. Large amounts cause renal
tubular damage, resulting in myeloma kidney. Bence-Jones proteins have
unusual heat solubility properties, in that they precipitate between 50- 60
degrees C and redisolve at 90 -100 degrees C. Historical detection methods
often utilized this unusual property.
Quiz :T/F:
The crystals that are seen in this image are calcium oxalate. - Answer :False;
These are leucine crystals.
, Quiz :Identify the urine sediment elements shown by the arrow:
A. Cholesterol crystals
B. Uric acid crystals
C. Amorphous urate crystals
D. Cystine crystals - Answer :D;
Cystine crystals are characteristically seen as colorless hexagonal plates in acid
urine. They may be confused with hexagonal uric acid crystals. They can be
differentiated from uric acid by their solubility in dilute hydrochloric acid
versus crystalline uric acid, which is not soluble in dilute hydrochloric acid. The
cyanide-nitroprusside test can be used to confirm the presence of cystine in
urine. Cystine crystals are not present in normal urine.
Quiz :An average adult would excrete approximately what volume of urine per
24 hours:
A. 3000 ml
B. 1500 ml
C. 750 ml
D. 250 ml - Answer :B;
Normal adult urine volume is 800 to 1800 ml/24hours for males, and 600 to
1600 ml/24 hours for females.
Quiz :Which of the following ketones is NOT detected in the Acetest® tablet
method?
A. Acetone
B. Beta-hydroxybutyric acid
C. Acetoacetic acid - Answer :B;
Acetest® does not detect beta-hydroxybutyric acid. Since sodium nitroprusside
(one of the main ingredients in the Acetest tablet) does not react with beta-
hydroxybutyrate, this compound is not measured by Acetest. It is important to
remember this fact, since a negative Acetest tablet does not completely rule
out a ketoacidosis diagnosis.
Quiz :Unconjugated bilirubin is conjugated in the liver with which of the
following substances to become water soluble?
A. Glycogen
B. Glucose oxidase
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