🩺 Q184: Which of the following describes the 'mounting' process in histology?
Anonymous Quiz
0%
Attaching the tissue block to the microtome chuck.
88%
B) Placing a coverslip over the tissue section using a synthetic resin.
12%
C) Embedding the tissue in a cassette for processing.
0%
D) Staining the slide with hematoxylin and eosin.
🩺 Q185: A urine sediment examination reveals the presence of 'ghost cells' and amorphous urates. Which of the following conditions is most consistent with the presence of ghost cells?
Anonymous Quiz
27%
A) Hypotonic urine
53%
B) Hypertonic urine
13%
C) Acidic urine
7%
D) Alkaline urine
🩺 Q187: What is the primary purpose of using a 'cell block' preparation in diagnostic cytology?
Anonymous Quiz
0%
A) To provide a permanent record of the specimen.
100%
B) To allow for histological architecture assessment and ancillary testing (IHC).
0%
C) To increase the concentration of cells for easier screening.
0%
D) To neutralize fixatives that interfere with DNA analysis.
🩺 Q187: A urine dipstick is positive for blood, but microscopic examination shows no RBCs. What is the most likely cause?
Anonymous Quiz
63%
A) Hemoglobinuria or myoglobinuria
38%
B) Ascorbic acid interference
0%
C) High specific gravity
0%
D) Bilirubin interference
🩺 Q189: In a clinical chemistry analyzer utilizing Beer's Law, a patient sample is tested for total protein. The absorbance is found to be 1.800, which exceeds the linearity limit of the instrument. What is the most appropriate action for the technologist?
Anonymous Quiz
7%
A) Report the result as 'greater than the upper limit of linearity'.
93%
B) Dilute the specimen with saline, re-run, and multiply the result by the dilution factor.
0%
C) Increase the incubation time for the reaction to reach completion.
0%
D) Extrapolate the result from the standard curve beyond the highest calibrator.
🩺 Q189: Which urinary crystal is described as a 'coffin-lid' appearance and is typically found in alkaline urine?
Anonymous Quiz
13%
A) Calcium oxalate
88%
B) Triple phosphate
0%
C) Uric acid
0%
D) Cystine
🩺 Q190: During serum protein electrophoresis on cellulose acetate, the technologist observes a 'split' albumin band. What is the most likely cause of this phenomenon?
Anonymous Quiz
93%
A) Bisalbuminemia, a genetic condition featuring two distinct albumin variants.
7%
B) Hemolysis of the serum sample during collection.
0%
C) Insufficient voltage applied to the electrophoresis chamber.
0%
D) Use of an incorrect buffer pH, causing protein denaturation.
🩺 Q192: Which type of cast is considered highly indicative of chronic renal failure when present in large numbers?
Anonymous Quiz
31%
A) Hyaline cast
63%
B) Waxy cast
6%
C) RBC cast
0%
D) WBC cast
🩺 Q192: In a flow cytometry immunophenotyping panel, the 'gating' strategy is used to isolate a specific population of cells. Which physical properties are typically used to create the primary gate for white blood cells?
Anonymous Quiz
47%
A) Forward Scatter (FSC) and Side Scatter (SSC).
47%
B) Fluorescence intensity of CD45 and CD14.
7%
Cell surface charge and molecular weight.
0%
D) Absorbance and refractive index.
🩺 Q194: A urine specimen from an infant has a 'mousy' odor. Which test should be performed to confirm the suspected metabolic disorder?
Anonymous Quiz
12%
A) Clinitest
82%
B) Ferric chloride test
6%
C) Ictotest
0%
D) Acetest
🩺 Q194: In a non-competitive (sandwich) ELISA for detecting a viral antigen, what happens to the signal intensity if the 'capture' antibody is inadvertently omitted from the wells?
Anonymous Quiz
14%
A) The signal will be falsely elevated due to non-specific binding.
50%
B) The signal will be zero or near-background, as the antigen cannot be immobilized.
21%
C) The signal will increase because the antigen binds directly to the plastic surface.
14%
D) The enzyme-labeled antibody will bind to the plastic, causing a high false-positive result.
🩺 Q195: When performing a CSF cell count, what is the most appropriate procedure if the sample is too bloody for accurate counting?
Anonymous Quiz
7%
A) Discard the sample
47%
B) Perform a dilution using saline
20%
C) Perform a dilution using glacial acetic acid
27%
D) Use a hemacytometer with a higher magnification
🩺 Q197: A freezing-point depression osmometer is used to measure serum osmolality. If the sample contains a high concentration of ethanol, how will the measured osmolality compare to the calculated osmolality?
Anonymous Quiz
20%
A) The measured osmolality will be significantly lower than the calculated value.
73%
B) The measured osmolality will be significantly higher than the calculated value.
0%
C) The measured osmolality will be identical to the calculated value.
7%
D) The freezing point depression will be unaffected by the presence of ethanol.
🩺 Q197: What is the primary diagnostic significance of a positive nitrite test on a urine dipstick?
Anonymous Quiz
13%
A) Presence of ketones
73%
B) Presence of bacteriuria
7%
C) Presence of bilirubin
7%
D) Presence of urobilinogen
🩺 Q199: In High-Performance Liquid Chromatography (HPLC) used for hemoglobin electrophoresis, what is the significance of the 'retention time' of a peak?
Anonymous Quiz
7%
A) It represents the concentration of the hemoglobin variant.
87%
B) It is the time taken for the specific hemoglobin to elute from the column.
0%
C) It is the peak area divided by the total area of all peaks.
7%
D) It indicates the molecular weight of the protein based on the column pressure.
🩺 Q200: A CSF specimen from a patient with meningitis shows Gram-negative diplococci. The organism is oxidase-positive and ferments glucose and maltose. What is the most likely pathogen?
Anonymous Quiz
20%
A) Neisseria gonorrhoeae
80%
B) Neisseria meningitidis
0%
C) Moraxella catarrhalis
0%
D) Haemophilus influenzae
🩺 Q200: Which fire extinguisher class is most appropriate for a fire involving electrical equipment in the laboratory?
Anonymous Quiz
7%
A) Class A.
80%
B) Class B.
13%
Class C.
0%
D) Class D.
🩺 Q202: Which analytical error is most likely to cause a falsely elevated potassium level in a serum sample?
Anonymous Quiz
47%
A) Prolonged tourniquet application
7%
B) Sample refrigeration
47%
C) Hemolysis of the sample
0%
Delayed centrifugation
🩺 Q202: If a laboratory uses a Levey-Jennings chart to monitor daily quality control, what does a trend indicate?
Anonymous Quiz
0%
A sudden, catastrophic failure of the instrument.
88%
B) A gradual change in control values over a period of days or weeks.
13%
C) A random distribution of values around the mean.
0%
D) The expiration of the control material.
🩺 Q204: In the context of the Donath-Landsteiner test, which condition is associated with a biphasic hemolysin that binds at low temperatures and causes hemolysis upon warming?
Anonymous Quiz
7%
A) Cold Hemagglutinin Disease
79%
B) Paroxysmal Cold Hemoglobinuria
14%
C) Warm Autoimmune Hemolytic Anemia
0%
Drug-induced hemolysis