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8 Cards in this Set
- Front
- Back
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Pathogen
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- Organism that causes disease
- Include microorganisms and some larger organisms - Pathogenic microbes include some bacteria and fungi, all viruses |
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Gas Exchange System
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- Air containing pathogen breathed in, trapped by mucus lining lung epithelium cells
- Cells have cilia that move mucus up trachea to mouth where it's removed - Some pathogens still able to reach alveoli where they invade cells and cause damage |
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Skin
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- Pathogen enters bloodstream through cuts
- Blood clots at area of damage to prevent pathogens from entering - some may get in before clot has formed |
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Digestive System
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- Pathogens in food are killed by acidic conditions of stomach
- Some may survive and pass into intestine where they invade cells of gut wall and cause damage |
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Production of Toxins
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Bacteria produce toxins into body and causes harm
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Cell Damage
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Pathogens damage host cell by:
- Rupturing them to release nutrients - Breaking down nutrients inside cell for their own use. This starves and kills cell - Replicating inside cell and bursting them when they're released |
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Factors increasing risk of Coronary Heart Disease (CHD)
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Poor Diet - high in saturated fat or salt
Smoking, lack of exercise and excessive alcohol intake - lead to HBP, which can damage heart and blood vessels |
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Factors increasing risk of Cancer
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Smoking - main cause of mouth, throat and lung cancer
Excessive exposure to to sunlight - can causes skin cancer Excessive alcohol intake - increase risk of liver cancer |
