Innate Immunity

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Questions and Answers

Which of the following is not a type of barrier protection against pathogens?

  • Cellular: Phagocytes
  • Physical: Epithelial cells
  • Chemical: antibodies, histamines, cytokines (correct)
  • Mechanical: cilia, fluids, smooth muscle contractions

Which enzyme is mentioned as a factor contributing to antimicrobial defense?

  • Peroxidase
  • Catalase
  • Lysozyme (correct)
  • Phosphorylase

What do lactoferrin and calprotectin do in the context of antimicrobial defense?

  • Bind metal ions needed by microbes to propagate (correct)
  • Neutralize toxins produced by pathogens
  • Inhibit viral replication
  • Promote phagocytosis of bacteria

Which of the following is not mentioned as a component of physical barrier protection against pathogens?

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

What is the role of psoriasin in the context of antimicrobial defense?

<p>Acts as an antibacterial agent to prevent colonization (C)</p> Signup and view all the answers

Which enzyme is involved in killing or inhibiting microbial growth on skin surfaces?

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

Which protein binds metal ions needed by microbes to propagate?

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

Which of these is an antibacterial agent that prevents colonization?

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

Which component is not mentioned as a type of barrier protection against pathogens?

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

Which of the following is not a mechanical barrier protection against pathogens?

<p>Antimicrobial peptides (D)</p> Signup and view all the answers

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