Ch1pp5-6
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Ch1pp5-6

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Questions and Answers

Which type of adaptive immunity combats extracellular microbes?

  • Innate immunity
  • Cell-mediated immunity
  • Passive immunity
  • Humoral immunity (correct)

    • What is the primary effector mechanism of cell-mediated immunity?

  • Secreted antibody
  • Killing infected cells by T lymphocytes (correct)
  • Preventing infections by antibodies
  • Activation of phagocytes by cytokines

    • Which type of adaptive immunity recruits and activates phagocytes to destroy ingested microbes?

  • Acquired immunity
  • Innate immunity
  • Cell-mediated immunity (correct)
  • Humoral immunity

    • Which type of adaptive immunity is mediated by B lymphocytes?

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

    What is the effector mechanism of Cytotoxic T lymphocytes?

    <p>Kills infected cell</p> Signup and view all the answers

    How do antibodies defend against microbes present in the gastrointestinal and respiratory tracts?

    <p>By preventing them from infecting tissue cells</p> Signup and view all the answers

    What is the main function of antibodies in defending against extracellular microbes?

    <p>Preventing microbial entry into tissue cells</p> Signup and view all the answers

    How are antibodies transported to protect the fetus and newborn from infections?

    <p>Through the placenta into the fetal circulation</p> Signup and view all the answers

    What is cell-mediated immunity primarily responsible for defending against?

    <p>Intracellular organisms</p> Signup and view all the answers

    What is a major function of cytokine-producing helper T lymphocytes?

    <p>Activating phagocytes to destroy ingested microbes</p> Signup and view all the answers

    What do most T cells recognize?

    <p>Peptide fragments of protein antigens presented on cell surfaces</p> Signup and view all the answers

    How is active immunity induced in an individual?

    <p>By infection or vaccination</p> Signup and view all the answers

    What characterizes passive immunity?

    <p>Transfer of antibodies from an actively immunized individual to a naive individual</p> Signup and view all the answers

    What is a physiologic example of passive immunity?

    <p>Newborns acquiring antibodies through placenta and breast milk</p> Signup and view all the answers

    How has passive immunity been used clinically for treating viral infections like SARS-CoV-2?

    <p>Using serum from immunized donors or purified antibodies from infected individuals for treatment.</p> Signup and view all the answers

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