What machine uses force to push the blood clot to the bottom of the tube, leaving the clear serum on the top?

• Autoclave

• Calibrator

• Centrifuge

• Incubator

What does plasma contain that differs from serum?

• Fibrinogen

• A buffy coat

• RBCs

• A clot

• WBCs

What is the correct needle position to be inserted for venipuncture?

• 90 degrees

• 30 degrees

• 45 degrees

• 15 degrees

What is the first step in a successful venipuncture?

• Select the site

• Put the patient at ease

• Apply the tourniquet appropriately

• Apply gloves

• Label the tubes with patient name

What is another term for syncope?

• Fasting

• Relaxation

• Fainting

• Reclining

Certain levels of blood components are decreased in capillaries. Which of the following is not decreased?

• Potassium

• Total protein

• Calcium

• Glucose

• None of the above

Which of the following additives does not bind with calcium when mixed with the blood specimen?

• Sodium Fluoride

• Potassium Oxalate

• Sodium Citrate

• EDTA

What is a buffy coat?

• Heavier erythrocytes

• Plasma

• Hemoglobin

• A mixture of leukocytes and thrombocytes

• A mixture of heavier erythrocytes and hemoglobin

Where are red blood cells (RBCs) produced?

• Liver

• Lymph nodes

• Spleen

• Bone marrow

What is the most common size needle used for regular vacuum tube systems?

• 16 G

• 18 G

• 20 G

• 21 G

• 22 G