Medical Laboratory Technician Urinalysis and Body Fluids Questions and Answers Flashcards
6 cards from real Medical Laboratory Technician Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
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Which crystal found in acidic urine appears as a hexagonal flat plate and is associated with an inherited metabolic disorder?
Answer: Cystine
Cystine crystals appear as colorless hexagonal plates in acidic urine and indicate cystinuria, an inherited amino acid transport disorder.
In a manual cell count of cerebrospinal fluid, the total WBC count is performed using which diluent?
Answer: Acetic acid with methylene blue
Dilute acetic acid lyses RBCs while methylene blue stains WBC nuclei, allowing accurate CSF white cell counting.
A urine specimen that turns dark brown-black upon standing most likely contains which substance?
Answer: Homogentisic acid
Homogentisic acid in alkaptonuria oxidizes upon exposure to air, causing urine to turn dark brown to black.
What is the clinical significance of finding oval fat bodies in a urine sediment?
Answer: Nephrotic syndrome with lipiduria
Oval fat bodies are renal tubular epithelial cells that have absorbed lipids, characteristic of nephrotic syndrome with significant proteinuria.
Which body fluid analysis finding is most characteristic of a traumatic lumbar puncture rather than a subarachnoid hemorrhage?
Answer: Decreasing RBC count in successive collection tubes
A traumatic tap shows progressively decreasing RBC counts from tube 1 to tube 3, while subarachnoid hemorrhage shows uniform counts.
Which reagent strip test uses a diazo reaction to detect a specific substance in urine?
Answer: Bilirubin
The bilirubin pad on the reagent strip uses a diazo coupling reaction where bilirubin reacts with a diazonium salt to produce an azo dye.