Ch10 diseases and immunity

• a pathogen is

  a disease causing organism
• a transmissible disease is

  a disease in which the pathogen can be passed from one host to another
• what are the three body defenses

  mechanical barrier; skin and hair in the nose

  chemical barrier; mucus and stomach acid

  cells: WBCs
• how to control the spreading of diseases

  clean water supply

  hygienic food preparation

  personal hygiene

  waste disposal

  sewage treatment
• antibodies are

  proteins that binds to antigens leading to the direct destruction of pathogens or marking them
• active immunity

  long term defense against a pathogen by antibody production in the body
• passive immunity

  short term defense against a pathogen by antibodies acquired from another individual