An organsim that feeds and lives on or in another organism.
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What is a host?
A host is an organism that harbours a parasite.
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How do vectors spread disease (malaria) ?
Mosquitos feed on blood and the malaria is passed on when the mosquito moves to another host.
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How do changes in lifestyle reduce the risk of some cancers?
Excercise, not smoking, healthy bodyweight and sun safety.
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How do changes in diet reduce the risk of some cancers?
Healthy balanced diet, less fat and salts.
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How do pathogens cause symptoms of disease?
By damaging cells and producing toxins.
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How do antibodies kill the pathogen?
By locking on to the antigens.
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What is a benign tumour?
A mass of cells that lack the ability to invade neighbouring tissue.
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What is a malignant tumour?
A group of cells capable of invading into neighbouring tissues.
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Explain the process of immunisation?
A harmless pathogen is given into the body that carries antigens, these antigens then trigger immune response by whiteblood cells which produce antibodies.
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Describe the benefits and risks associated with immunisation?
Positive affect on the immune system but sometimes can make you ill.
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Name three ways new treatments are tested?
Using animals, human tissue or computer models.
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Other cards in this set
Card 2
Front
What is a host?
Back
A host is an organism that harbours a parasite.
Card 3
Front
How do vectors spread disease (malaria) ?
Back
Card 4
Front
How do changes in lifestyle reduce the risk of some cancers?
Back
Card 5
Front
How do changes in diet reduce the risk of some cancers?
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