Hematology: Composition of Peripheral Blood and Clotting
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Questions and Answers

What is the approximate percentage of liquid in the blood?

  • 90%
  • 20%
  • 70% (correct)
  • 40%

    • What happens when blood is mixed with anticoagulant?

  • The liquid part becomes thicker
  • It solidifies immediately
  • It forms a solid clot faster
  • Clotting is prevented (correct)

    • Which component of the blood is nearly 90% water?

  • Leukocytes
  • Erythrocytes
  • Serum
  • Plasma (correct)

    • What is the preferred anticoagulant mentioned in the text?

    <p>K2EDTA</p> Signup and view all the answers

    Which component is present in plasma but not in serum?

    <p>Clotting factors and fibrinogen</p> Signup and view all the answers

    How many populations are the cells of the blood divided into?

    <p>2</p> Signup and view all the answers

    What is the main function of leukocytes (white blood cells)?

    <p>To fight infection and disease in the body</p> Signup and view all the answers

    What is the difference between granulocytes and agranulocytes?

    <p>Granulocytes have granules in their cytoplasm, while agranulocytes do not.</p> Signup and view all the answers

    What is the main function of neutrophils?

    <p>To fight infection and disease in the body</p> Signup and view all the answers

    What is the difference between segmented neutrophils and band neutrophils?

    <p>Segmented neutrophils have a nucleus divided into 2-5 distinct lobes, while band neutrophils have a horseshoe-shaped nucleus.</p> Signup and view all the answers

    What is the normal range for segmented neutrophils in adults?

    <p>45-70%</p> Signup and view all the answers

    What is the normal range for band neutrophils in adults?

    <p>2-5%</p> Signup and view all the answers

    What is the primary function of erythrocytes (red blood cells)?

    <p>Gas exchange - carrying oxygen and carbon dioxide</p> Signup and view all the answers

    Which of the following statements about erythrocytes is true?

    <p>They have a lifespan of approximately 120 days</p> Signup and view all the answers

    What is the normal range for the mean corpuscular volume (MCV) of erythrocytes?

    <p>80 - 100 fL</p> Signup and view all the answers

    What is the term used to describe young erythrocytes that contain ribonucleic acid (RNA)?

    <p>Reticulocytes</p> Signup and view all the answers

    What is the term used to describe erythrocytes that appear slightly more blue in color on a blood smear?

    <p>Polychromatic cells</p> Signup and view all the answers

    What is the normal range for the erythrocyte (red blood cell) count in blood?

    <p>4.5 - 6.0 million cells per microliter</p> Signup and view all the answers

    What is the normal percentage range of eosinophils in the total white blood cell count?

    <p>2-6%</p> Signup and view all the answers

    Which of the following is NOT a function of eosinophils?

    <p>Defense against viral infections</p> Signup and view all the answers

    Which molecule represents 50% of the content in the major granules of eosinophils?

    <p>Major basic protein (MBP)</p> Signup and view all the answers

    Which of the following granule contents in eosinophils has a toxic effect by catalyzing the production of reactive oxygen species (ROS)?

    <p>Eosinoperoxidase</p> Signup and view all the answers

    What is the primary function of the Charcot-Leyden protein found in the primary granules of eosinophils?

    <p>Marker for respiratory and gastrointestinal hypereosinophilia</p> Signup and view all the answers

    Which of the following conditions is associated with an increase in eosinophil count?

    <p>Allergic reactions</p> Signup and view all the answers

    Why does the number of bands increase with acute stress or infection?

    <p>Acute stress or infection causes increased production of neutrophils in the bone marrow</p> Signup and view all the answers

    Why can't neutrophils return to the blood once they have entered the tissues?

    <p>Neutrophils are designed to only move in one direction, from the blood into the tissues</p> Signup and view all the answers

    What is the primary function of neutrophils in the tissues?

    <p>To kill bacteria using antimicrobial agents</p> Signup and view all the answers

    What percentage of the vascular pool of neutrophils is in the marginating pool?

    <p>50-55%</p> Signup and view all the answers

    What is the significance of the marginating pool of neutrophils?

    <p>The marginating pool can be rapidly mobilized in response to acute stress</p> Signup and view all the answers

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