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 (B)</p> Signup and view all the answers

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

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

What do RIG-like receptors (RLRs) recognize?

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

What type of patterns are recognized by PRRs?

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

What is a characteristic feature of adaptive immune responses?

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

Which type of cells are involved in innate immune responses?

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

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