Immune System- Key (HCMS)
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27 terms
Terms | Definitions |
|---|---|
 Pathogen | A virus or microorganism that causes disease. |
| Infectious Disease | A disease that can pass from one organism to another. |
| Pasteurization | A heating process that is widely used to kill microorganisms in food products such as milk. |
| Inflammatory Response | Part of the body's defense against pathogens, in which white blood cells leak from the blood vessels into tissues; the white blood cells destroy pathogens by breaking them down. |
| Phagocyte | A white blood cell that destroys pathogens by engulfing them and breaking them down. |
| Fever | An above-normal body temperature that is part of the inflammatory response. |
| Immune Response | Part of the body's defense against pathogens in which cells of the immune system react to each kind of pathogen with a defense targeted specifically at that pathogen. |
| T cell | A lymphocyte that identifies pathogens and distinguishes one pathogen from another. |
| Antigen | A molecule on a cell that the immune system can recognize either as part of the body or as coming from outside the body. |
| B Cell | A lymphocyte that produces a chemical that helps destroy a specific kind of pathogen. |
| Antibody | A chemical produced by a B cell of the immune system that destroys a specific type of pathogen. |
| AIDS | A disease caused by a virus that attacks the immune system. |
| Immunity | The ability of the immune system to destroy pathogens before they can cause disease. |
| Active Immunity | Immunity that occurs when a person's own immune system produces antibodies in response to the presence of a pathogen. |
| Vaccination | The process by which harmless antigens are deliberately introduced into a person's body to produce active immunity. |
| Vaccine | A substance used in a vaccination that consists of pathogens that have been weakened or killed but can still trigger the immune system. |
| Passive Immunity | Immunity in which the antibodies that fight a pathogen come from another organism rather than from a person's own body. |
| Antibiotic | A chemical that kills bacteria or slows their growth without harming the body's cells. |
| Noninfectious Disease | A disease that is not spread from person to person. |
| Allergy | A disorder in which the immune system is overly sensitive to a foreign substance. |
| Allergen | A substance that causes an allergy. |
| Histamine | A chemical that is responsible for the symptoms of an allergy. |
| Asthma | A disorder in which the respiratory passages narrow significantly |
| Insulin | A chemical produced in the pancreas that enables the body's cells to take in glucose from the blood and use it for energy. |
| Diabetes | A condition in which either the pancreas fails to produce enough insulin, or the body's cells cannot use insulin properly. |
| Tumor | A mass of abnormal cells that develop when cancerous cells divide and grow uncontrollably. |
| Carcinogen | A substance or factor in the environment that can cause cancer. |
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