#1
Which of the following is a critical step in specimen collection?
Labeling the specimen container
ExplanationProper labeling ensures accurate identification.
#2
What does the acronym SOP stand for in the context of laboratory procedures?
Standard Operating Procedure
ExplanationSOPs are established protocols for consistent operations.
#3
In laboratory terminology, what does 'hemolysis' refer to?
The breakdown of red blood cells
ExplanationHemolysis results in the release of intracellular components into the plasma.
#4
Which of the following is a commonly used anticoagulant in blood collection tubes?
Sodium citrate
ExplanationSodium citrate prevents blood clotting for further processing.
#5
Which of the following is a commonly used preservative for urine specimens?
Boric acid
ExplanationBoric acid preserves urine specimens for analysis.
#6
What is the purpose of centrifugation in laboratory procedures?
To separate components based on density
ExplanationCentrifugation separates substances based on their densities.
#7
Which of the following specimens usually requires immediate processing to avoid degradation?
Whole blood
ExplanationWhole blood degrades quickly if not processed promptly.
#8
Which of the following is NOT a recommended method for specimen transport?
Sending specimens in an unmarked container
ExplanationUnmarked containers risk misidentification and mishandling.
#9
What is the primary purpose of a chain of custody form in laboratory procedures?
To track the location and handling of a specimen
ExplanationMaintains integrity and accountability of specimen handling.
#10
Which of the following is an example of a pre-analytical error in laboratory testing?
Incorrect specimen labeling
ExplanationErrors occurring before analysis, such as mislabeling, can compromise results.
#11
What is the primary purpose of quality control measures in laboratory testing?
To ensure accurate and reliable test results
ExplanationQuality control safeguards against errors and ensures result reliability.
#12
What is the recommended temperature range for storing most biological specimens in a laboratory freezer?
-80°C to -70°C
ExplanationThese temperatures preserve specimen integrity.