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3 Cards in this Set
- Front
- Back
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What is a pathogen? |
A microorganism that causes disease |
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Why are the digestive and respiratory systems often the sites of entry for pathogens? |
Diffusion takes place in these systems so they have a large SA, are thin, moist and well supplied with blood vessels. This makes it easy for pathogens to attach to and penetrate them. |
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In what 2 ways do pathogens cause disease? |
●By damaging the host tissues. Viruses inhibit the synthesis of DNA, RNA and proteins by the host cells. ●By producing toxins |
