Immunology of Gut Mucosa

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Questions and Answers

What is the primary function of mucins in the gut?

  • To facilitate the colonization of beneficial commensal gut bacteria
  • To modulate the immune response to allergens
  • To regulate the uptake of nutrients from the gut
  • To trap and remove pathogens and intestinal antigens from the GI tract (correct)

What is the approximate concentration of bacteria in the colon?

  • 10^3/ml
  • 10^9/ml
  • 10^12/ml (correct)
  • 10^6/ml

What is the function of beneficial commensal gut bacteria?

  • To produce vitamins and break down toxins
  • To communicate with the nervous system
  • To prevent colonization by pathogens
  • All of the above (correct)

What is the purpose of Waldeyer’s Ring?

<p>To guard the entrance to the respiratory and GI tracts (B)</p> Signup and view all the answers

What is the characteristic of mucins that allows them to trap pathogens?

<p>Their extended, well-hydrated configuration (B)</p> Signup and view all the answers

What is the function of Peyer’s patches in the gut?

<p>To function as mini-lymph nodes, identifying and responding to pathogens (B)</p> Signup and view all the answers

What is the composition of isolated lymphoid follicles in the gut?

<p>Primarily composed of B cells (C)</p> Signup and view all the answers

What is the result of pathogens becoming entangled in mucins?

<p>They are removed from the body through the GI tract (D)</p> Signup and view all the answers

What is the purpose of the appendix in the gut?

<p>To function as a lymphoid organ, packed with lymphoid follicles (D)</p> Signup and view all the answers

What is the mechanism by which mucins are formed in the gut?

<p>Through the formation of di-sulfide bonds between glycoproteins (D)</p> Signup and view all the answers

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