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1 Blood Collection Tubes and Specimen Basics Online Quiz Questions

Use this free practice quiz with 20 questions to review 1 Blood Collection Tubes and Specimen Basics, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

Why must a light-blue sodium citrate tube be filled to its indicated volume when collecting a specimen for coagulation testing?

  1. A

    It ensures there is enough serum for chemistry testing.

  2. B

    It maintains the correct blood-to-citrate ratio for coagulation testing.

  3. C

    It prevents the tube’s separator gel from forming.

  4. D

    It allows the citrate to inhibit glycolysis.

02
Choose one
1 point

A laboratory requests a blood specimen for lithium measurement. Why is a lithium-heparin tube generally unsuitable for this test?

  1. A

    It contains an additive that prevents glycolysis.

  2. B

    It produces serum rather than plasma.

  3. C

    The tube’s lithium additive could interfere with the lithium measurement.

  4. D

    It binds calcium reversibly for coagulation testing.

03
Choose one
1 point

Using the commonly used order of draw, which tube group follows serum tubes and comes before lavender or pink tubes?

  1. A

    Gray tubes containing fluoride/oxalate

  2. B

    Green or light-green heparin tubes

  3. C

    Lavender or pink EDTA tubes

  4. D

    Light-blue citrate tubes

04
True or false
1 point

True or false: When present, separator gel forms a barrier between blood cells and serum or plasma after centrifugation.

  1. A

    True

  2. B

    False

05
True or false
1 point

True or false: A discard tube is automatically required for every blood collection in which a light-blue citrate tube is collected first.

  1. A

    True

  2. B

    False

06
Fill in the blank
1 point

Fluoride-containing additives help preserve glucose in some collection conditions by slowing .

07
Fill in the blank
1 point

ACD is used to preserve blood cells for selected .

08
Written response
1 point

Which anticoagulant binds calcium strongly and is commonly used for blood-cell analysis?

09
Written response
1 point

What is the liquid portion of anticoagulated blood, separated from the blood cells, called?

10
Choose all
1 point

Select all statements that correctly describe an anticoagulant’s action or use.

  1. A

    Citrate binds calcium reversibly and is used for coagulation testing.

  2. B

    EDTA is the preferred additive for preventing glycolysis in glucose specimens.

  3. C

    EDTA binds calcium strongly and is commonly used for blood-cell analysis.

  4. D

    Heparin produces serum by helping blood clot.

  5. E

    Heparin prevents clot formation through its effects on clotting factors.

11
Choose all
1 point

Select all actions that support reliable specimen collection and handling.

  1. A

    Verify the requested tests and any preparation or special handling instructions.

  2. B

    Gently invert additive tubes as directed by the manufacturer or laboratory.

  3. C

    Shake additive tubes vigorously to ensure thorough mixing.

  4. D

    Label each tube with required information before leaving the patient.

  5. E

    Pour blood from one tube into another if the first tube is underfilled.

12
Choose one
1 point

A trace-element test requires a royal-blue tube. What should you do before selecting the tube?

  1. A

    Choose any royal-blue tube because all versions have the same contents.

  2. B

    Select the version specified by the laboratory, since royal-blue tubes can contain different additives.

  3. C

    Use only a royal-blue tube containing lithium heparin.

  4. D

    Choose a royal-blue tube only when a serum specimen is required.

13
Open ended
1 point

How should an additive-containing tube be mixed after collection, and why should it not be shaken vigorously?

14
Choose one
1 point

A test’s required tube is uncertain, and two tubes with similar cap colors are available. Which approach best supports a suitable specimen?

  1. A

    The same cap color always guarantees the same additive and test suitability.

  2. B

    Tube colors and additives can vary, so selection should follow the test-specific laboratory instructions.

  3. C

    A tube’s cap color is more reliable than the laboratory’s test directory.

  4. D

    Any tube is suitable if it can hold the required volume of blood.

15
Choose one
1 point

A laboratory specifies a gray tube for a glucose test. Which common additive in gray tubes helps slow glycolysis?

  1. A

    Lithium heparin

  2. B

    Sodium fluoride

  3. C

    EDTA

  4. D

    Sodium citrate

16
Choose one
1 point

A blood-bank test request requires a specimen for an antibody screen. Which tube is commonly used for this purpose, subject to the blood bank’s collection rules?

  1. A

    Light-blue tube with sodium citrate

  2. B

    Gold SST with clot activator and separator gel

  3. C

    Pink tube with EDTA

  4. D

    Gray tube with fluoride and oxalate

17
Choose one
1 point

A gold SST tube is collected for a serum test. What should happen before the tube is centrifuged?

  1. A

    Allow the blood to clot as directed before centrifugation.

  2. B

    Centrifuge immediately so the gel can promote clotting.

  3. C

    Shake vigorously before centrifugation.

  4. D

    Transfer the blood into a tube with a different additive.

18
True or false
1 point

Can EDTA carryover into a subsequent chemistry specimen interfere with measurements of calcium or potassium?

  1. A

    True

  2. B

    False

19
Written response
1 point

What is the liquid portion of anticoagulated blood called when it has been separated from the blood cells?

20
Written response
1 point

A CBC is requested, and the specimen is kept as the complete mixture of blood cells and liquid rather than being separated. What specimen type is required?