Body's Defence To Disease

Nota:

• Body's Response To Disease

1. Barriers

   Nota:

   • Intact Skin
   1. Intact Skin
      1. Low Moisture, low PH, Layers of dead cells
   2. Intact Mucous Membrane
      1. Saliva contains enzymes that destroy pathogens
   3. Enzymes in tears, mucous in the nose
   4. Good bacteria
      1. Found in intestine, mucous, airway, vagina
   5. Flushing effects
      1. Tears
      2. Urine
      3. Diarrhoea
2. Non-specific responses
   1. Complement proteins
   2. Macrophages
   3. White Blood Cells
   4. Inflammation
3. Immune Response
   1. Immune system
      1. B Lymphocytes
         1. Make antibodies that attach to the pathogen that destroy it or leave it vulnerable
         2. Humerol response
      2. T Lymphocyte
         1. Cellular response
         2. Attach to the pathogen and destroy it
      3. Memory cells
         1. Memory lymphocytes that are exposed to a pathogen remain in the body so if there is another attack there is an instant response
            1. From this the medical world has created vaccination
      4. Types of immunity
         1. Active immunity
            1. Exposed to the disease
            2. Vaccines
         2. Passive immunity
            1. From mother via placenta
            2. Colostrum
            3. Short lived - no memory lymphocytes are created