17923159
Description
Flashcards by Sam Gunnell, updated more than 1 year ago
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Created by Sam Gunnell
about 5 years ago
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| Question | Answer |
| What is a parasite? | An organism that lives in or on a host organism causing them harm |
| Give an example of a parasite | Tapeworm |
| What are pathogens? | Micro-organisms that cause disease |
| Why are pathogens classed as parasites? | They live in or on a host organism |
| How do pathogens cause damage? | -They can take neutrients -Produce toxins -Damage host tissue |
| What diseases are most common in developing countries? Why? | Infectious diseases due to poor sanitation, unsafe water, poverty |
| What diseases are more common in developed countries? Why? | Degenerative disorders as people tend to live longer due to increased hygiene etc |
| Is bacteria prokaryote or eukaryote? | Prokaryote |
| How can bacteria cause disease? | Pathanogenic bacteria can cause disease and waste products can often be toxins |
| Do bacterial diseases make us ill quickly or slowly? Why? | Very quick as they reproduce quickly |
| What are viruses? | Non-living pathogens that are parasites |
| How do viruses cause damage? | They invade living cells, then reproduce rapidly and the cell will eventually lyse (burst), releasing the virus |
| What makes viral diseases hard to treat? | They evolve rapidly so they can become resistant to new treatments quickly |
| What are protoctistas? | Single celled organisms thta act as pathogens and parasites, using animals as their host |
| Give an example of a disease caused by protoctistas? | Malaria |
| What are saprophytes? | They sectrete enzymes onto dead/decaying matter |
| What happens when a plant has a fungal infection? | Photosynthesis stops |
| How do fungal diseases spread rapidly? | They reproduce, creating millions of spores that can cause the fungi to spread through a crop of plants |
| What is droplet infection? | Coughs/sneezes |
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