Host-Parasite Interactions in Laboratory Medicine
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Questions and Answers

Which type of cells are the major defense against viral infections?

  • Cytotoxic T Lymphocytes (correct)
  • Natural Killer cells
  • B cells
  • Macrophages
  • Where is MHC Class II restricted to in the body?

  • Mononuclear cells (correct)
  • Lymphocytes
  • All nucleated cells
  • Macrophages
  • What is the role of Perforin in viral infections?

  • It destroys infected cells by lysis
  • It promotes viral replication
  • It binds to infected cells
  • It makes holes in infected cell's membrane (correct)
  • In viral infections, which molecules interact with each other in MHC-peptide interactions?

    <p>MHC and Peptide</p> Signup and view all the answers

    What is the main mechanism through which Cytotoxic T cells destroy infected body cells?

    <p>Creating holes in the cell membrane</p> Signup and view all the answers

    Which type of molecules have a 3D structure that plays a crucial role in antigen presentation?

    <p>MHC Class I &amp; II molecules</p> Signup and view all the answers

    Which cells are the main effector mechanisms against virus and virus-infected cells?

    <p>Natural Killer Cells</p> Signup and view all the answers

    In viral infections, which type of molecules are involved in opsonization of viruses?

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

    Where is MHC Class I antigen distribution primarily seen in the body?

    <p>All nucleated cells</p> Signup and view all the answers

    What is the main function of Cytotoxic T Lymphocytes in viral infections?

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

    Which molecules are directly involved in forming holes in infected cell membranes during cell killing in viral infections?

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

    Where is MHC Class II antigen distribution primarily restricted to in the body?

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

    What is the role of Macrophages in viral infections?

    <p>Phagocytose opsonized viruses</p> Signup and view all the answers

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