Human Defence System Multiple Choice
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Questions and Answers

Which part of the body is considered a physical barrier in the general defence system?

  • Mucous membranes
  • Lysozyme
  • Nasal hairs
  • Clotting (correct)
  • What is the function of lysozyme in the general defence system?

  • It produces lactic acid
  • It kills bacteria (correct)
  • It removes dead cells
  • It traps pathogens
  • What is the main function of phagocytes in the general defence system?

  • To trap pathogens
  • To produce lactic acid
  • To surround and kill microorganisms (correct)
  • To remove dead cells
  • What is the role of macrophages in the general defence system?

    <p>To act as longer living phagocytes</p> Signup and view all the answers

    Which body part contains bacteria that produce lactic acid to prevent the growth of pathogens?

    <p>The vagina</p> Signup and view all the answers

    What is the function of nasal hairs in the general defence system?

    <p>To remove suspended micro-organisms from the air</p> Signup and view all the answers

    Which cells produce antibodies in response to antigens?

    <p>Lymphocytes</p> Signup and view all the answers

    What is the purpose of the complement system?

    <p>To trigger a complement reaction</p> Signup and view all the answers

    What is the role of interferons in the immune system?

    <p>To prevent the spread of viruses</p> Signup and view all the answers

    What causes inflammation in response to infection?

    <p>Histamine</p> Signup and view all the answers

    What is the purpose of antibodies?

    <p>To prevent pathogens from entering host cells</p> Signup and view all the answers

    What is artificial active immunity?

    <p>Inoculation with a non-diseasing causing part of a pathogen</p> Signup and view all the answers

    Which type of immunity occurs when a child receives antibodies from the mother either before birth or through breastfeeding?

    <p>Natural Passive Immunity</p> Signup and view all the answers

    Where do B-cells mature?

    <p>Bone marrow</p> Signup and view all the answers

    What are the rapidly produced cells called when a B-cell comes into contact with an antigen?

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

    What is the term for B-cells that remain alive and are already present when the same antigen reappears in the organism?

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

    What is the role of Helper T-cells in the immune system?

    <p>Recognize antigens on the surface of other white blood cells</p> Signup and view all the answers

    What is the protein released by Killer T-cells that forms pores in the membranes of the cells they attack?

    <p>Perforin</p> Signup and view all the answers

    What is the role of Suppressor T-cells in the immune system?

    <p>Suppress or inhibit immune response</p> Signup and view all the answers

    What do Memory T-cells stimulate in the immune system?

    <p>Memory B-cells to produce antibodies</p> Signup and view all the answers

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