Disease 0.0 / 5 ? BiologyDisease and immunityASAQA Created by: KateCreated on: 20-02-14 20:08 Pathogens Organisms which cause disease Include large organisms like tape worms Also micro organisms some bacteria, some fungi and all viruses 1 of 9 Organism interface-Gas exchange system GAS-EXCHANGE SYSTEM Air which contains pathogens is breated in Most sre trapped in the mucus lining in the epithelium Cillia waft the mucus up to the mouth Pathogens which reach the alveoli invade cells and cause damage 2 of 9 Organism interface-Skin Damage to skin Pathogens enter blood stream Blood clots at the area Some get in before the clot forms 3 of 9 Organism interface-Digestive System Eat or drink food that contains pathogens Most are killed by the acid in the stomach Some pass into the intestine Invade cells and the gut wall 4 of 9 Production of toxins Bacteria produce toxins into the body Bacterium that causes tetnus blocks the function of certian nerve cells Causing muscle spasms 5 of 9 Cell damage Physically damage host cells by: Rupturing- Release nutrients (protiens) inside them Breaking down - Nutrients for own use. starves and kills the cell Replicating- Inside cells, bursting them when they're released (Viruses) 6 of 9 Coronary heart Disease (CHD) Increased by: Poor diet- High sat fat or salt Smoking Lack of excersize Excessive alcohol intake All increase bp which dmage the heart and blood vessels 7 of 9 Cancer Uncontrolled cell division, increase the risk: Smoking - Mouth, throat, and lung cancer Exposure to sunlight - Increase Skin cancer (UVb radiation) Alcohol intake - Liver cancer 8 of 9 Cancer Uncontrolled cell division, increase the risk: Smoking - Mouth, throat, and lung cancer Exposure to sunlight - Increase Skin cancer (UVb radiation) Alcohol intake - Liver cancer 9 of 9
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