320490
Description
Flashcards by Emma Mountain, updated more than 1 year ago
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Created by Emma Mountain
almost 11 years ago
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| Question | Answer |
| What is a pathogen? | A pathogen is a micro-organism that causes disease |
| Why are the digestive and respiratory system often sites of entry for pathogens? | Diffusion takes place in these systems to they have a large surface area, are thin, moist and well supplied with blood vessels. This makes it easy for pathogens to attach and penetrate them. |
| In which two ways do pathogens cause disease? | By damaging host tissues and by producing toxins which inhibit the overall function of a cell |
| Suggest one reason why oral antibiotics are not normally used to treat gastroenteritis and other diarrhoel diseases | A person with gastroenteritis has both vomiting and diarrhea. These symptoms mean that the antibiotic is not likely to stay in the body long enough to be absorbed |
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