A pathogen is any organism that causes disease - e.g. bacteria, viruses
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What are the 3 main interfaces used by pathogens to enter the body?
Gas exchange system, skin and digestive system
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How does the ga exchange system have adaptations to prevent pathogens entering the body?
If air that contains pathogens is breather in, most will be trapped in mucus which lines the lung epithelium.
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What do cilia in the gas exchange system do?
Beat and move mucus up the trachea to the mouth where pathogens are removed
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How do pathogens enter the bloodstream via skin?
Damaged skin e.g a cut
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How does the skin protect the body from pathogens?
Blood clots to prevent pathogens from entering
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How does the digestive system protect the body against pathogens?
The acidic conditions of the stomach will kill most pathogens entered the body via food/drink
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How do pathogens cause disease?
By producing toxins and by cell damage
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How do pathogens damage host cells?
By rupturing them to release nutrients, by breaking down nutrients inside the cell to starve the cell, by replicating inside the cell and bursting them when they are released
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What are some risk factors for Coronary Heart Disease?
Poor diet high in sweetcorn
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What are some risk factors for Cancer?
Smoking, excessive exposure to sunlight and excessive alcohol intake
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Other cards in this set
Card 2
Front
What are the 3 main interfaces used by pathogens to enter the body?
Back
Gas exchange system, skin and digestive system
Card 3
Front
How does the ga exchange system have adaptations to prevent pathogens entering the body?
question 5 answer is wrong it is supposed to be Poor diet, high in saturated fat and salt, smoking and excessive alcohol intake not Poor diet high in sweetcorn.
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