disease, vaccinations

• antibiotic resistance 


  resistance to a chemical poison is the ability of an organism to survive exposure to a dose of poison that would usually kill them
• vaccinations

  -a small amount of dead or inactive pathogen is injected into the body

  -antigens will stimulate an immune response from the body

  -lymphocytes will produce antibodies to destroy the pathogen

  -memory cells will be produced, these will be able to recognise the antigen if it ever enters the body again
• lymphocyte 


  produces antibodies
• antibody

  a chemical produced by the white blood cells to target pathogens
• antigen 


  a unique marker on the surface of a pathogen made from protein
• how are pathogens spread?

  -contact

  -aerosol

  -body fluids

  -water

  -insects

  -contaminated foods
• phagocyte

  -phagocyte engulfs the pathogen

  -enzymes inside the phagocyte will break down the pathogen

  -it will then eject the harmless pathogen back out
• pathogen

  a disease causing microorganism