Innate Immunity: PRRs and Signaling Receptors Quiz
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Questions and Answers

What is the main function of Type 1 PRRs in the cognitive phase of innate immunity?

  • Circulating in blood and lymph
  • Inducing phagocytosis by binding to pathogen-derived proteins
  • Initiating complement activation by binding to bacterial carbohydrates (correct)
  • Facilitating antigen processing and presentation to T cells

    • How are Type 1 PRRs different from Type 2 PRRs in the cognitive phase of innate immunity?

  • They induce phagocytosis by binding to pathogen-derived proteins
  • They have high affinity for mannose residues
  • They are produced by the liver and induced by IL-6
  • They are secreted and circulate in blood and lymph (correct)

    • Which protein is an example of a Type 1 PRR that binds to carbohydrates on bacteria to initiate complement activation?

  • Interleukin-6
  • Mannan binding lectin (correct)
  • C-reactive protein
  • Scavenger receptor

    • Where are Toll-like receptors (TLRs) located?

    <p>On macrophages, dendritic cells, and epithelial cells</p> Signup and view all the answers

    What is the function of Nod-like receptors (NLRs)?

    <p>Recognizing specific PAMPs</p> Signup and view all the answers

    What do RIG-like receptors (RLRs) recognize?

    <p>Pathogen-Associated Molecular Patterns (PAMPs)</p> Signup and view all the answers

    What type of patterns are recognized by PRRs?

    <p>Pathogen-Associated Molecular Patterns (PAMPs)</p> Signup and view all the answers

    What is the characteristic of innate immune responses in terms of antigen recognition?

    <p>Recognize antigens based on common structural motifs.</p> Signup and view all the answers

    Which type of immune response has a second response against a pathogen that is better, faster, and stronger than the first?

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

    What is a characteristic feature of adaptive immune responses?

    <p>Cells express a unique antigen receptor</p> Signup and view all the answers

    Which type of cells are involved in innate immune responses?

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

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