Immunology 101: Blood Composition and Leukocytes Formation
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Questions and Answers

Which type of leukocytes are granulocytes?

  • Eosinophils
  • Monocytes
  • Lymphocytes
  • Neutrophils (correct)

    • What is the composition of the middle layer in centrifuged blood, known as the buffy coat?

  • Leukocytes and platelets (correct)
  • Hemoglobin
  • Plasma
  • Erythrocytes

    • What is the percentage of the sample that the buffy coat occupies in centrifuged blood?

  • 10%
  • 44%
  • Less than 1% (correct)
  • 25%

    • Which leukocytes are categorized as non-phagocytes?

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

    What is the difference between innate and acquired immunity?

    <p>Innate immunity is present at birth while acquired immunity develops over time</p> Signup and view all the answers

    Which leukocytes are classified as phagocytes?

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

    What do activated B-cells transform into?

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

    What is the shape of an antibody?

    <p>Y-shaped</p> Signup and view all the answers

    Which leukocyte is characterized by having multi-lobed nuclei?

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

    Which type of leukocytes are involved in allergic reactions and parasitic infections?

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

    What is the process of leukocyte formation called?

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

    Which type of immunity involves the use of antibodies?

    <p>Acquired immunity</p> Signup and view all the answers

    Which type of white blood cells are mainly responsible for fighting bacterial infections?

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

    Which type of white blood cells are primarily involved in combating parasitic infections?

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

    Where do most lymphocytes develop?

    <p>Peripheral lymphoid organs</p> Signup and view all the answers

    What is the primary function of eosinophils?

    <p>Inflammation reduction</p> Signup and view all the answers

    Which type of white blood cells is responsible for releasing primarily histamine and other chemicals like bradykinin and serotonin?

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

    Which type of immunity is characterized by specific defenses and the production of circulating antibodies?

    <p>Humoral immunity</p> Signup and view all the answers

    Where are B lymphocytes primarily produced?

    <p>Bone marrow</p> Signup and view all the answers

    "Plasmablasts" are activated B lymphocytes that eventually develop into:

    <p>&quot;Plasma cells&quot;</p> Signup and view all the answers

    "IgG" antibodies account for approximately what percentage of total antibodies and have the ability to cross the placenta?

    <p>~75%, able to cross placenta</p> Signup and view all the answers

    What is the primary function of MHC-I molecules?

    <p>Present foreign peptides to cytotoxic T cells</p> Signup and view all the answers

    What is the main function of cytotoxic T cells?

    <p>Kill infected or abnormal cells</p> Signup and view all the answers

    Which type of white blood cells are mainly responsible for presenting foreign peptides to helper T cells?

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

    Which type of leukocytes are primarily responsible for releasing histamine, bradykinin, serotonin, and other substances involved in allergic reactions?

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

    What is the primary function of neutrophils among leukocytes?

    <p>Phagocytic activity</p> Signup and view all the answers

    Which type of leukocytes are mainly responsible for combating parasitic infections and have weak phagocytic activity?

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

    Where do most B lymphocytes originate from?

    <p>Bone marrow</p> Signup and view all the answers

    Which component of the antibody structure is responsible for the specificity of the antibody?

    <p>Variable portion</p> Signup and view all the answers

    Which type of immunoglobulin is involved in opsonization and crosses the placenta?

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

    "Plasmablasts" are activated B lymphocytes that eventually develop into:

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

    Which type of leukocytes are categorized as non-phagocytes?

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

    Where do most lymphocytes develop?

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

    What is the primary function of MHC-I molecules?

    <p>Presenting foreign peptides to helper T cells</p> Signup and view all the answers

    Which type of immunity involves specific defense mechanisms including humoral immunity and cellular immunity?

    <p>Acquired Immunity</p> Signup and view all the answers

    Which cytokine primarily stimulates the differentiation of neutrophils and monocytes?

    <p>Colony-stimulating factors (CSF)</p> Signup and view all the answers

    What is the primary function of basophils?

    <p>Releasing histamine and other chemicals</p> Signup and view all the answers

    Where do granulocytes and monocytes primarily develop?

    <p>Bone marrow</p> Signup and view all the answers

    Which leukocytes are classified as non-phagocytes?

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

    What is the shape of an erythrocyte (red blood cell)?

    <p>Biconcave disc</p> Signup and view all the answers

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