| Term | Definition |
|---|
| bacteria | extremely small unicellular organisms without a nucleus; prokaryotic cells |
| antibiotic | medicine that kills or slows the growth of bacteria |
| pathogen | any disease-producing agent (especially a virus or bacterium or other microorganism) |
| antigen | substance that, when introduced into the body, causes formation of antibodies against it |
| antibody | a substance produced by the body that destroys or inactivates an antigen that has entered the body |
| virus | A strand of nucleic acid encased in a protein coat that can infect cells and replicate within them |
| vector | an organism, such as an insect, that transmits pathogens |
| A.I.D.S. | acquired immunodeficiency syndrome |
| protist | a eukaryotic organism that cannot be classified as an animal, plant, or fungus |
| vaccine | solution made from dead viruses that is use to prevent viral disease |
| immunity | Resistance to disease |
| T-cell | lymphocytes that develop in the thymus and are responsible for immunity |
| B cell | a white blood cell that matures in bones and makes antibodies |
| allergic response | when the immune system overreacts to an otherwise harmless substance |
| antibiotic resistance | when some bacteria are able to survive in the presence of an antibiotic |
Combine with other sets
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