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Immune System Collaboration quiz

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  • What is the first part of the immune system to respond to a pathogen?
    The innate immune system is the first to respond to a pathogen.
  • What type of receptors do innate immune cells use to recognize pathogens?
    Innate immune cells use pattern recognition receptors, such as toll-like receptors, to recognize pathogens.
  • What happens after a pathogen is recognized by the innate immune system?
    White blood cells or macrophages engulf and degrade the pathogen, then present its antigens via MHC molecules.
  • What is the role of antigen-presenting cells (APCs) in immune system collaboration?
    APCs, like dendritic cells, process pathogens and present their antigens to activate T helper cells.
  • How do T helper cells become activated?
    T helper cells are activated when APCs present antigens to them using MHC molecules.
  • What are cytokines and what is their main function?
    Cytokines are inflammatory molecules secreted by activated T helper cells that enhance the immune response.
  • How do cytokines affect white blood cells during an infection?
    Cytokines increase the number of white blood cells, promote their migration to the infection site, and improve cell adhesion.
  • Which immune system do T helper cells belong to?
    T helper cells are part of the adaptive immune system.
  • What are the two main types of T helper cells and their functions?
    TH1 cells activate macrophages and cytotoxic T cells to target internalized pathogens, while TH2 cells stimulate B cells to produce antibodies against extracellular pathogens.
  • How do TH1 cells contribute to the immune response?
    TH1 cells activate macrophages and cytotoxic T cells, which help kill internalized pathogens.
  • What is the function of TH2 cells in immune system collaboration?
    TH2 cells activate B cells to produce antibodies that target extracellular pathogens.
  • How do T helper cells bridge the innate and adaptive immune systems?
    T helper cells, once activated by the innate immune system, further activate cells in the adaptive immune system, such as cytotoxic T cells and B cells.
  • What is the role of dendritic cells in immune system collaboration?
    Dendritic cells act as antigen-presenting cells, taking up antigens, processing them, and presenting them to T helper cells.
  • What is the significance of MHC molecules in immune system collaboration?
    MHC molecules display processed antigens on the surface of APCs, enabling activation of T helper cells.
  • Why is the interaction between the innate and adaptive immune systems important?
    The interaction ensures a comprehensive immune response, with cytokines playing a key role in connecting both systems during infection.