Innate Immunity Quiz
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Questions and Answers

Which of the following best describes the function of the complement system?

  • Directly destroying pathogens by lysing their cell membranes
  • Preventing the activation of phagocytes
  • Inhibiting the release of cytokines and chemokines
  • Opsonizing pathogens and inducing an inflammatory response (correct)
  • What triggers the activation of the complement system?

  • Inhibition by plasma proteins
  • Local activation at sites of infection (correct)
  • Interaction with antibodies
  • Systemic distribution throughout the body
  • How is the complement system activated?

  • Through interaction with cytokines
  • By inhibiting phagocytosis
  • By direct binding to pathogens
  • Through a triggered-enzyme cascade (correct)
  • What is the role of activated complement proteins in the immune response?

    <p>Opsonizing pathogens and recruiting more phagocytes</p> Signup and view all the answers

    Which protein mediates the ingestion of complement-tagged pathogens by phagocytes?

    <p>CR1</p> Signup and view all the answers

    What is the main function of chemokines?

    <p>Induce directed chemotaxis in nearby responsive cells</p> Signup and view all the answers

    Which cells are mainly guided by chemokines in the adaptive immune response?

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

    What is the role of terminal complement proteins in killing certain pathogens?

    <p>Forming pores in membranes</p> Signup and view all the answers

    Which type of cytokines induce responses through binding specific receptors on target cells?

    <p>TNF family cytokines</p> Signup and view all the answers

    What is the function of small fragments of complement?

    <p>Stimulate increased blood flow</p> Signup and view all the answers

    Which proteins are lacking on pathogen surfaces, allowing C3 to work?

    <p>DAF and CD55</p> Signup and view all the answers

    What is the main role of complement activation?

    <p>Creating pores in bacterial membranes</p> Signup and view all the answers

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