Immunity
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Created by:
kristinmlr on January 16, 2011
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27 terms
Terms | Definitions |
|---|---|
 disease | the absence of homeostasis, the cause of loss of equilibrium in organism that results in illness |
| host | the organism that a nourishes and supports a parasite |
| imbalance | when a cell, organ, organism, or ecosystem is outside the "normal," healthy range, a loss of homeostasis, a loss of equilibrium |
| immune system | collection of organs that fight and promote resistance to disease |
| immunity | resistance to disease |
| infections | invasions by pathogens |
| infectious agent | a pathogen |
| microbes | microscopic organisms |
| parasite | an organism that lives on or in a host and causes it harm |
| pathogen | a disease causing organism |
| pathogenic | the characteristic of being able to cause a disease |
| toxic | having the ability to damage an organism |
| toxin | any substance than is inhaled, ingested, or absorbed at dosages high enough to damage a living organism. |
| vaccination | injection of a weakened or mild form of a pathogen to produce immunity |
| viral disease | loss of homeostasis caused by a virus |
| virus | a strand of hereditary material surrounded by a protein coating, needs a host so it can replicate |
| AIDS | The name of the late stages of HIV infection; defined by a specific reduction of T cells and the appearance of characteristic secondary infections. |
| white blood cell | a blood cell that fights disease |
| engulf | swallow up |
| allergic reactions | immune reactions to normally harmless substances |
| antibiotic | compound that blocks the growth and reproduction of bacteria |
| antigens | foreign substances that stimulate the production of antibodies. |
| bacteria | single-celled organisms that lack a nucleus; prokaryotes |
| diagnosis | identification of a disease, identifying the nature or cause of some phenomenon |
| active immunity | immunity produced by exposure to an antigen, as a result of the immune response |
| passive immunity | immunity that results when an individual receives the immune agents from some source other than his or her own body |
| antibody | a protein made by white blood cells that act against a specific antigen |
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