Mucosal Surfaces and Microorganisms Entry Quiz
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Questions and Answers

How many antibodies does IgA have, and how many antigen-binding sites does it have?

  • 1 antibody, 2 antigen-binding sites
  • 2 antibodies, 4 antigen-binding sites (correct)
  • 2 antibodies, 2 antigen-binding sites
  • 1 antibody, 4 antigen-binding sites

    • What is the function of J chain in secretory IgA synthesis and transport?

  • Binding to IgA in plasma cells (correct)
  • Secreting IgA at the lateral surface of epithelial cells
  • Polymerizing in the basal surface of epithelium
  • Transporting IgA across epithelial cells

    • Which function is unique to sIgA compared to IgG?

  • Enzyme and toxin neutralisation
  • Immune exclusion (correct)
  • Virus neutralisation
  • Inhibition of adherence

    • What is a function carried out only by IgG, not by sIgA?

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

    What do mucosal T cells help maintain?

    <p>Environment that doesn't respond to commensal microbiota</p> Signup and view all the answers

    Which two factors play key roles in regulating T cell responses?

    <p>TGF-b and Retinoic acid</p> Signup and view all the answers

    What is the purpose of oral tolerance?

    <p>&quot;State of immune non-responsiveness by oral administration of antigens&quot;</p> Signup and view all the answers

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