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___ The yellow-top tube is primarily used for:
A. Coagulation tests
B. Blood cultures and sterile specimens
C. Glucose tolerance tests
D. Hematology tests
B. Blood cultures and sterile specimens
___ Red-top tubes usually contain:
A. Heparin
B. EDTA
C. No additives
D. Sodium citrate
C. No additives
__ Lavender-top tubes contain which additive?
A. Sodium citrate
B. EDTA
C. Heparin
D. Sodium fluoride
B. EDTA
___ Royal blue tubes are typically used for:
A. Coagulation tests
B. Toxicology and nutritional studies
C. Blood cultures
D. CBC
B. Toxicology and nutritional studies
__ Anticoagulants prevent blood from:
A. Clotting
B. Hemolyzing
C. Settling
D. Separating
A. Clotting
___ The additive in the yellow-top tube is:
A. Sodium fluoride
B. EDTA
C. Sodium polyanetholesulfonate (SPS)
D. Sodium citrate
C. Sodium polyanetholesulfonate (SPS)
___ Red-top tubes are commonly used for:
A. CBC
B. Coagulation testing
C. Serum determinations (chemistry, blood bank)
D. Glucose tolerance
C. Serum determinations (chemistry, blood bank)
___ EDTA functions by:
A. Binding calcium
B. Enhancing thrombin
C. Promoting clotting
D. Inhibiting glycolysis
A. Binding calcium
___ Tan-top tubes are used for testing:
A. Glucose
B. Lead C. Coagulation
D. Blood culture
B. Lead
___ Heparin inhibits:
A. Thrombin
B. Calcium
C. Glycolysis
D. Platelet activation
A. Thrombin
___ The additive sodium citrate prevents coagulation by:
A. Destroying calcium
B. Binding calcium
C. Activating thrombin
D. Inhibiting glycolysis
A. Destroying calcium
___ The thixotropic gel in some red or gold tubes:
A. Acts as an anticoagulant
B. Separates serum from cells during centrifugation
C. Promotes coagulation
D. Preserves glucose
B. Separates serum from cells during centrifugation
___ Lavender-top tubes are used for:
A. Coagulation testing
B. Blood culture
C. Hematology (CBC, ESR, retic count)
D. Chemistry
C. Hematology (CBC, ESR, retic count)
___ The additive in tan-top tubes is:
A. Heparin
B. Sodium fluoride
C. EDTA
D. SPS
C. EDTA
___ Clot activators function to:
A. Inhibit glycolysis
B. Promote coagulation
C. Preserve glucose
D. Bind calcium
B. Promote coagulation
___ The blue-top tube is commonly used for:
A. Coagulation studies (PT, PTT, fibrinogen)
B. Chemistry tests
C. Blood cultures
D. Glucose tolerance
A. Coagulation studies (PT, PTT, fibrinogen)
___ Green-top tubes contain:
A. Heparin (sodium or lithium)
B. EDTA
C. Sodium citrate
D. Potassium oxalate
A. Heparin (sodium or lithium)
___ The gray-top tube additive combination includes:
A. EDTA and sodium citrate
B. Sodium fluoride and potassium oxalate
C. Heparin and gel
D. SPS and dextrose
B. Sodium fluoride and potassium oxalate
__ The light blue-top tube contains:
A. Sodium citrate
B. EDTA
C. Heparin
D. Sodium fluoride
A. Sodium citrate
___ Which additive works by enhancing antithrombin activity?
A. EDTA
B. Heparin
C. Sodium citrate
D. SPS
B. Heparin
___ Before drawing a blue-top tube, you should:
A. Shake it 10 times
B. Draw 2–3 mL of blood in a tube without additives first
C. Draw it last
D. Invert it once
B. Draw 2–3 mL of blood in a tube without additives first
___ The green-top tube is commonly used for:
A. Blood cultures
B. Hematology
C. Routine chemistry tests
D. Glucose tolerance
C. Routine chemistry tests
___ The gray-top tube is used for:
A. Glucose and lactic acid measurement
B. Hematology
C. Blood culture
D. Serum chemistry
A. Glucose and lactic acid measurement
___ Tubes with anticoagulants must be filled completely to:
A. Ensure proper color separation
B. Maintain correct blood-to-additive ratio
C. Prevent cell lysis
D. Reduce clotting time
B. Maintain correct blood-to-additive ratio
___ Sodium fluoride acts as a:
A. Coagulant
B. Preservative that inhibits glycolysis
C. Clot activator
D. Separator
B. Preservative that inhibits glycolysis