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24 Cards in this Set
- Front
- Back
Bacteria |
Make you feel ill by producing toxins that damage cells and tissues |
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Viruses |
live inside cells, replicate and burst |
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protists |
eukaryotes, parasites |
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fungi |
single celled, hyphae which grow and penetrate human skin or surfaces of plants causing disease, they can grow spores |
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Pathogens can be spready by: |
water air and direct contact |
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measles - virus |
spread by droplets, develop red skin rash and fever, can lead to pneumonia, most people are vaccinated |
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HIV - virus |
spread by bodily fluid(sex or needles), flu like symptoms, early hiv can be controlled be antiretroviral drugs which stop the virus replicating |
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Tobacco mosaic virus |
affects plants, discoloured, photosynthesis can't happen |
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rose black spot- fungal disease |
causes purple or black spots on leaves, leaves can turn yellow and fall off, less photosynthesis so stunted growthl, can be treated by fungicides and stripping off affected leaves. |
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malaria-protist |
mosquito, fever, reduced by mosquito nets, breading and insecticides |
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gonorrhoea - bacteria |
STD, pain when urinate, thick yellow or green discharge on vagina or penis, can be treated by penicillin |
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Preventing disease |
hygiene, vaccination, destroying vectors, quarrentine |
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Fighting diease |
1.engulf foreign cells (phagocytosis), producing antibodies, producing anti toxins |
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vaccination |
injecting a dead or inactive form of a pathogen into the body |
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Gas exchange in lungs |
Enormous surface area Moist lining thin walls good blood suppy |
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villi |
big SA single layer of surface cells good blood supply for quick absorption |
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Leaves |
flattened shape guard cells oxygen and water vapour diffuse in and out |
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gills |
water enters fish through mouth and passes out through gills. big SA lots of blood capillaries thin surface layer |
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rate |
1000/time |
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Benedict's test |
for sugars blue to yellow, green and brick red |
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iodine |
for starch browny orange to blue, black |
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bireut test |
for proteins blue to pink or purple |
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platelets |
help blood clot |
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Sudan 3 test |
for lipids top layer bright red |