B3 - Infection & Response

Microbes
1. Bacteria
  1. Gonorrheoa - an STD passed on by unprotected sex
  2. Salmonella - food poisoning. Toxins in the bacteria make a person ill
2. Fungi
  1. the largest microorganism
    1. Some fungi spoil foods and can cause illness
    2. fungi are a good source of protein and make wine, beer, bread and blue chees
  2. Rose Black Spot
    1. Ca
3. Virus
  1. Tobacco mosaic Virus (TMV)
  2. HIV
    1. Attacks white blood cells, preventing the body from defending itself from other pathogens
4. Pathogen - causes disease
External Body Defenses
1. Tears
  1. Dissolve microbes
2. Ear wax
  1. Traps microbes
3. Mucus
  1. traps and kill bacteria
4. stomach acid
  1. Kills microbes we eat
Internal Body defences
1. White blood cells
  1. Phagocytes
    1. these engulf microbes and destroy them
  2. Memory white blood cells
    1. Produce antibodies to attach to microbes
      1. the antibodies clump the microbes together
    2. These remember how to make antibodies quickly if the same microbe infects
Medicine
1. Vaccination
2. Antibiotics
  1. Antibiotic Resistance
3. Painkillers
4. Drug Testing
  1. Cells and tissue
    1. Animals
      1. Healthy volunteers
        Patients in a double blind test with a placebo
        A placebo is a pill with does nothing
        A double blind test is a test where neither the patient nor the doctor giving the pill knows which is the drug or the placebo
5. Monoclonal Antibodies
  1. Pathogen injected into a mouse
    1. Lymphocytes harvested
      1. Joined with a tumour cell to make a hybridoma
        Hybridoma reproduces rapidly and produces many antibodies
        Antibodies are collected and given to treat disease

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B3 - Infection & Response

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	Created by Mr D Richards over 2 years ago