Pathogen Recognition by Innate Immune Cells
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Questions and Answers

What is the function of pattern recognition receptors (PRRs) in the innate immune response?

  • Help with blood clotting
  • Assist in nerve signal transmission
  • Produce antibodies to fight against pathogens
  • Recognize characteristic features of pathogens and molecules released by stressed or damaged cells (correct)

Why is the variety of pattern recognition receptors (PRRs) limited in cells of the innate immune system?

  • Because genes for each receptor type must be encoded by specific genes
  • To increase the number of antigens recognized
  • To make space for more DNA replication
  • Due to the finite surface area of the cell membrane (correct)

How does the strategy of the innate immune system in using a limited number of receptors compare to that of the adaptive immune system?

  • Both systems use a limited number of receptors with broad pathogen recognition
  • Neither system uses receptors for pathogen recognition
  • Innate immune system uses limited receptors with broad pathogen recognition, while adaptive immune system uses many highly specific receptors (correct)
  • Adaptive immune system uses limited receptors with broad pathogen recognition, while innate immune system uses many highly specific receptors

Why are the pattern recognition receptors (PRRs) present on the cell surface whether they are needed or not?

<p>As they must be ready to recognize pathogens at any time (C)</p> Signup and view all the answers

What is one reason for the limited variety of pattern recognition receptors (PRRs) in cells of the innate immune system?

<p>Each receptor type must be encoded by a specific gene (D)</p> Signup and view all the answers

What distinguishes the approach of the innate immune system from that of the adaptive immune system regarding the number and specificity of receptors?

<p>Innate immune system uses fewer broadly active receptors, while adaptive immune system uses many highly specific receptors (C)</p> Signup and view all the answers

What happens when cells of the innate immune system recognize a pathogen?

<p>They initiate phagocytosis (A)</p> Signup and view all the answers

What is the function of chemokines in the immune response?

<p>Attract cells through chemotaxis (D)</p> Signup and view all the answers

What is the role of cytokines in cell communication?

<p>Allowing cells to communicate with each other over short distances (B)</p> Signup and view all the answers

What do receptors of the innate immune system usually include?

<p>Receptors for bacterial components (B)</p> Signup and view all the answers

When are soluble factors secreted during the immune response?

<p>During early induced responses and later during adaptive responses (A)</p> Signup and view all the answers

What does a chemokine primarily do in the immune response?

<p>Attract cells through chemotaxis (B)</p> Signup and view all the answers

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