Immunology 101: Composition of Blood and Blood Cell Formation
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Questions and Answers

Which component makes up 44% of the centrifuged blood sample?

  • Plasma
  • Leukocytes
  • Erythrocytes (correct)
  • Platelets

    • Which leukocytes are classified as granulocytes?

  • Monocytes
  • Eosinophils
  • Lymphocytes
  • Neutrophils (correct)

    • What characterizes activated B-cells?

  • Production of histamine
  • Differentiation into plasma cells (correct)
  • Release of cytokines
  • Phagocytosis

    • What is the main function of eosinophils?

    <p>Release of histamine</p> Signup and view all the answers

    Which leukocytes are classified as non-phagocytes?

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

    What is the composition of the middle gray-white layer in a centrifuged blood sample?

    <p>Leukocytes and platelets</p> Signup and view all the answers

    What is the percentage of granulocytes in normal peripheral blood?

    <p>65%</p> Signup and view all the answers

    Which type of infections is associated with increased neutrophil count (neutrophilia)?

    <p>Bacterial infections</p> Signup and view all the answers

    What is the primary function of eosinophils?

    <p>Attacking parasites</p> Signup and view all the answers

    Which cells primarily release histamine and other chemicals involved in allergic reactions?

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

    What is the main function of innate defenses in immunity?

    <p>Resisting damaging organisms and toxins</p> Signup and view all the answers

    Where do B lymphocytes primarily originate?

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

    What is the function of activated B lymphocytes in the immune response?

    <p>Secreting antibodies</p> Signup and view all the answers

    Which type of immunoglobulin is responsible for allergic reactions and histamine release?

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

    What is the function of basophils in the immune response?

    <p>Releasing histamine and other mediators of inflammation</p> Signup and view all the answers

    Which leukocytes are involved in the adaptive immune response?

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

    What is the main function of natural killer cells in the immune system?

    <p>Killing virus-infected and tumor cells</p> Signup and view all the answers

    Which leukocyte population is primarily responsible for engulfing and destroying pathogens by phagocytosis?

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

    What is the primary role of monocytes in the immune system?

    <p>Differentiating into macrophages and dendritic cells to phagocytose pathogens and present antigens</p> Signup and view all the answers

    Which leukocyte population is primarily responsible for combating parasitic infections?

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

    What characterizes activated T-cells in the immune response?

    <p>Receiving signals from antigen-presenting cells to proliferate and produce cytokines</p> Signup and view all the answers

    What is the primary function of dendritic cells in the immune system?

    <p>Presenting antigens to activate other immune cells</p> Signup and view all the answers

    What is the main function of plasma cells in the immune response?

    <p>Producing antibodies to neutralize pathogens</p> Signup and view all the answers

    Which leukocyte population is primarily responsible for promoting inflammation by releasing histamine and other mediators?

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

    What is the primary function of macrophages in the immune system?

    <p>Phagocytosing pathogens and presenting antigens to activate other immune cells</p> Signup and view all the answers

    What is the primary function of neutrophils in the immune system?

    <p>Engulfing and destroying pathogens by phagocytosis</p> Signup and view all the answers

    Which leukocyte population is primarily responsible for combating viral infections?

    <p>Natural killer cells</p> Signup and view all the answers

    What is the main function of plasma cells in the immune response?

    <p>Producing antibodies specific to antigens</p> Signup and view all the answers

    Which leukocytes are classified as agranulocytes?

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

    What is the primary function of dendritic cells in the immune system?

    <p>Presenting antigens to T-lymphocytes to initiate adaptive immune responses</p> Signup and view all the answers

    Which component makes up the majority of the centrifuged blood sample?

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

    What is the primary role of monocytes in the immune system?

    <p>Engulfing and destroying pathogens by phagocytosis</p> Signup and view all the answers

    What is the main function of eosinophils?

    <p>Releasing histamine and other chemicals involved in allergic reactions</p> Signup and view all the answers

    What characterizes activated B-cells?

    <p>Releasing antibodies to neutralize antigens</p> Signup and view all the answers

    Where do B lymphocytes primarily originate?

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

    What is the main function of macrophages in the immune system?

    <p>Engulfing and destroying pathogens by phagocytosis</p> Signup and view all the answers

    What is the primary function of innate defenses in immunity?

    <p>Recognizing and responding rapidly to a wide variety of pathogens</p> Signup and view all the answers

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