How well do you know the body's defense mechanisms?
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Questions and Answers

Which type of cells form a mechanical barrier against microbes at the interfaces between the body and the external environment?

  • Epithelial cells (correct)
  • Red blood cells
  • Platelets
  • White blood cells
  • What is the name of the substance produced by mucosal epithelial cells that prevents most microbes from interacting with and infecting or getting through the epithelia?

  • Lymphocytes
  • Keratin
  • Antimicrobial peptides
  • Mucus (correct)
  • What are the names of the antimicrobial peptides produced by epithelial cells that kill bacteria and some viruses by disrupting their outer membranes?

  • Chemokines and cytokines
  • Interferons and interleukins
  • Defensins and cathelicidins (correct)
  • Complement proteins
  • What are the lymphocytes called that belong to the T cell lineage but express antigen receptors of limited diversity, and are found in the epithelia?

    <p>Intraepithelial T lymphocytes</p> Signup and view all the answers

    What is the name of the lipid structures that intraepithelial T lymphocytes often recognize and react against in infectious agents that attempt to breach the epithelia?

    <p>Microbial lipids</p> Signup and view all the answers

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