| A | B |
| allergen | antigen that can cause an allergic response |
| allergic disorder | disorder characterized by a hyperimmune response to weak antigens that are usually harmless |
| alloimmunity | immune response waged against transplanted organs and tissues that carry nonself antigens |
| anaphylaxis | rapid and profound allergic response characterized by shock, laryngeal edema, wheezing, stridor, tachycardia, and generalized itching |
| angioneurotic edema | acute swelling of the face, neck, lips, larynx, hands, feet, genitals, and internal organs; sometimes abbreviated as angioedema |
| autoantibodies | antibodies against self-antigens |
| autoimmune disorder | disorder in which killer T cells and autoantibodies attack or destroy natural cells |
| chemotaxis | process of attracting migratory cells to a particular area within the body |
| chronic fatigue syndrome | complex of symptoms primarily characterized by profound lack of energy with no identifiable cause that worsens with physical activity and does not improve with rest |
| desensitization | form of immunotherapy in which a client receives weekly or twice weekly injections of dilute but increasingly higher concentrations of an allergen |
| exacerbation | periods of acute flare-ups of the symptoms of a disorder |
| fibromyalgia | pain in the fibrous tissues of the body such as muscles, ligaments, and tendons |
| histocompatible cells | cells whose antigens match an individual's own genetic code |
| mast cells | constituents of connective tissue that contain granules of heparin, serotonin, bradykinin, and histamine; the release of granules causes various allergic and inflammatory namifestations |
| neurally mediated hypotension | disorder in which individuals experience hypotension accompanied by fatigue after standing for more than 10 minutes |
| remission | asymptomatic periods of a disorder |
| sensitization | development of antibodies to an antigen |
| tilt-table test | diagnostic test in which a client lays horizontally on a talbe that is elevated to approximately 70 degrees for 45 minutes while blood pressure and pulse are monitored |
| urticaria | hives |