Immunological Apparatus and Protective Barriers Quiz
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Questions and Answers

What is the main function of the skin as a protective barrier?

  • Allows easy microbial access
  • Forms a barrier with a bacteria-hostile environment due to low pH (correct)
  • Secretes alkaline substances
  • Provides a bacteria-friendly environment

    • What is the primary function of mucus produced by the mucous membranes?

  • To limit foreign microbial growth
  • To secrete bactericidal substances
  • To trap particles and push them back up (correct)
  • To provide an acidic environment

    • How do the innate and adaptive immune systems differ in their response to a threat?

  • The innate system is slow and specific, while the adaptive system is fast and general
  • The innate system is fast and recognizes patterns, while the adaptive system is slow and specific (correct)
  • The innate system is slow and specific, while the adaptive system is fast and general
  • The innate system is fast and general, while the adaptive system is slow and specific

    • What is the relationship between the innate and adaptive immune systems?

    <p>The innate system defeats the threat, and the adaptive system completes the fight</p> Signup and view all the answers

    What is the role of the gut's natural bacterial flora in providing protection?

    <p>They limit foreign microbial growth</p> Signup and view all the answers

    Where do the cells of the immune system, such as leukocytes, originate from?

    <p>They develop from the pluripotent (haemopoietic) stem cell that differentiates into myeloid or lymphoid stem cells</p> Signup and view all the answers

    Which type of immune cells recognize very specific sequences?

    <p>B-lymphocytes</p> Signup and view all the answers

    What type of cells are activated into cytotoxic T cells that kill infected cells?

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

    Which immune system component uses natural antibodies and NK cells?

    <p>Complement system</p> Signup and view all the answers

    In the immune system, what types of cells can be activated into T helper cells promoting B cell maturation?

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

    What happens to T and B cells reacting to self-antigens during maturation?

    <p>They are sorted out</p> Signup and view all the answers

    Which type of interactions occur between immune cells, where more interactions imply greater strength?

    <p>Noncovalent interactions</p> Signup and view all the answers

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