| A | B |
|---|
| active immunity | immunity that occurs when a person's own immune system produces antibodies in response to the presence of a pathogen |
| AIDS(aquired immunodeficiency syndrome) | a disease caused by a virus that atttacks the immune system |
| allergen | a substance that causes an allergy |
| allergy | a disorder in which the immune system is overly sensitive to a foreign substance |
| antibiotic | a chemical that kills bacteria or slows their growth without harming the body cells of humans |
| antibody | a chemical produced by a B cell of the immune system that destroys a specific kind of pathogen |
| 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 |
| asthma | a disorder in which the respiratory passages narrow significantly |
| B cell | a lymphocyte that produces chemicals that destroy a specific kind of pathogen |
| carncinogen | a substance or a factor in the environment that can cause cancer |
| diabetes | a condition in which either the pancreas fails to produce enough insulin, or the body's cells can't use it properly |
| 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 |
| immunity | the ability of the immune system to destroy pathogens before they can cause disease |
| infectious disease | a disease that that can pass from one organism to another |
| inflammatory response | part of the body's defense against pathogens,in which fluid and white blood cells leak from blood vessels into tissues; the white blood cells destroy pathogens by breaking them down |
| 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 |
| histamine | a chemical that is responsible for the symptoms of an allergy |
| lymphocyte | white blood cell that reacts to each kind of pathogen with a defense targeted specifically at that pathogen |
| noninfectious disease | a disease that is not spread from person to person |
| pasteurization | a heating process that is widely used to kill microorganisms in food products such as milk |
| pathogen | an organism that causes disease |
| passive immunity | immunity in which the antibodies that fight a pathogen come from another organism rather than from the person's own body |
| phagocyte | a white blood cell that destroys pathogens by engulfing them and breaking them down |
| T cell | a lymphocyte that identifies pathogens and distinguishes one pathogen from the other |
| tumor | a mass of abnormal cells that developes when cancerous cells divide and grow uncontrollably |
| vaccination | the process by which harmless antigens are deliberatly 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 into action |
