Antigen Elimination Mechanism and Antiviral Functions Quiz
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Questions and Answers

What is the role of Natural Killer (NK) cells?

  • Killing tumor cells, fungi, and virus-infected cells (correct)
  • Producing lytic enzymes during infections
  • Responding to interferons or cytokines
  • Secreting antibodies
  • Where do B lymphocytes mature?

  • MALT
  • Thymus
  • Blood
  • Bone marrow (correct)
  • What is the main function of Neutrophils during infections?

  • Secreting histamine
  • Serving as antigen-presenting cells
  • Producing interferons
  • Releasing hydrolytic enzymes (correct)
  • Which cell type is least common among granulocytes?

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

    What is the distinctive feature of Natural Killer (NK) cells?

    <p>Having large size and prominent granulation</p> Signup and view all the answers

    From which cell type are Macrophages derived?

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

    What is one of the mechanisms of antigen elimination mentioned in the text?

    <p>T cell proliferation</p> Signup and view all the answers

    Which type of cell is cytotoxic to some tumor cells and can stimulate T cell proliferation and IL-2 production according to the text?

    <p>NK cell</p> Signup and view all the answers

    What is a recommended management approach for viral infections as mentioned in the text?

    <p>Supportive treatment</p> Signup and view all the answers

    In the context of Covid-19 pneumonia, what is stressed by the Department of Health (DOH) regarding antibiotic usage?

    <p>Avoid antibiotic usage</p> Signup and view all the answers

    Which of the following components helps in neutralizing microbes and toxins by opsonization and phagocytosis?

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

    What is the primary function of Colony-Stimulating Factors according to the text?

    <p>Directing bone marrow stem cell division</p> Signup and view all the answers

    What is the significance of specificity in the immune system?

    <p>Ability to recognize and respond to many different microbes</p> Signup and view all the answers

    Which role of the immune system implies the potential for immunotherapy of cancer?

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

    What does clonal expansion in the immune system refer to?

    <p>Keeping pace with rapidly proliferating microbes</p> Signup and view all the answers

    How does the immune system achieve nonreactivity to self?

    <p>Preventing injurious immune responses against host cells</p> Signup and view all the answers

    Which type of immunity results from our body developing antibodies as a defense mechanism?

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

    What is the main function of polymorphonuclear leukocytes (neutrophils) in the immune response?

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

    What is the function of C3a in the complement pathway?

    <p>Induces inflammation</p> Signup and view all the answers

    In the alternative pathway, what helps stabilize the C3 convertase (C3bBb)?

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

    Which component of the complement pathway is responsible for opsonization and phagocytosis?

    <p>C3b</p> Signup and view all the answers

    What initiates the classic pathway of the complement system?

    <p>C1</p> Signup and view all the answers

    Which component of the complement system constitutes the membrane attack complex?

    <p>C5-9</p> Signup and view all the answers

    Which type of immunoglobulin makes up 20% of the protein in blood plasma?

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

    Which mechanism involves the release of lymphokines or cytokines directly affecting effector cells?

    <p>Third mechanism</p> Signup and view all the answers

    In which type of hypersensitivity reaction do antigens react with IgE bound to mast cells causing degranulation and the release of histamine?

    <p>Type I (Anaphylactic)</p> Signup and view all the answers

    Which function is NOT associated with histamine in the context of hypersensitivity reactions?

    <p>Cytokine secretion</p> Signup and view all the answers

    Which hypersensitivity reaction involves immune complex deposition in vessel walls and other substances?

    <p>Type III (Immune Complex)</p> Signup and view all the answers

    What is the primary mediator involved in the Type I (Anaphylactic) hypersensitivity reaction?

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

    Which condition is NOT an example given for Type I (Anaphylactic) hypersensitivity reactions?

    <p>Autoimmune diseases</p> Signup and view all the answers

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