New CH 21

• Main functions of lymphoid system:

  • immune surveillance
  • absorption of lipids
  • fluid recovery
• Lymphoid cells w/ its functions:

  1. May defend against a kidney transplant = natural killer cells
  2. Receive antigens presented to them by APCs = T Lymphocytes
  3. Alert the body if bacteria gets through the skin = Dendritic cells
  4. May ingest and destroy bacteria = macrophages
  5. Give rise to cells the secrete antibodies = B lymphocytes
• What type of immunity is mediated by B cells and the antibodies they secrete?

  Humoral
• What protein inhibits the viral infection of neighboring cells?

  Interferon
• The ability to ward off a specific infection or disease, usually as a result of prior exposure in the body's production of antibiotics or lymphocytes against one pathogen, is called?

  Adaptive immunity