From Citizendium, the Citizens' Compendium
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- Anaphylaxis : An acute allergic reaction caused by exposure to an antigen to which the patient is hypersensitive.
- Basophil : A circulating leukocyte which, when sensitized to a specific antigen by means of an immunoglobulin E molecule bound to its surface, will release physiologically potent chemicals on recognizing that antigen
- Biogenic amine receptor : Cell surface proteins that bind biogenic amines with high affinity and regulate intracellular signals which influence the behavior of cells.
- Brain : The core unit of a central nervous system.
- Central nervous system : The main information-processing organs of the nervous system, consisting of the brain, spinal cord, and meninges.
- Chronic obstructive pulmonary disease : A group of diseases characterized by the pathological limitation of airflow in the airway that is not fully reversible.
- Complement (immunologic) : A sequence of normally inactive proteins, which, when activated by foreign proteins of bacteria and other microorganisms, produce protein variants that variously open holes in the cell wall of invaders, and also opsonize the foreign cells to make them "tasty" to attack cells that will destroy them with phagocytosis
- Cytokines : The chemical messengers of the immune system, primarily but not exclusively carried in blood
- Edema : Abnormal fluid accumulation in tissues or body cavities.
- Histamine antagonist : A member of a class of drug that binds to cell surface receptors for histamine1, histamine2, and histamine3 receptors, preventing them from activating. The receptor types have a variety of functions; histamine1 activities include allergic reactions and nausea, histamine2 reduce gastric acid secretion and relax smooth muscle, and histamine3, still in research, have central nervous system effects. "Antihistamines" are most often histamine1 blockers.
- Immediate hypersensitivity : Humoral reaction, mediated by the circulating B lymphocytes, which causes any of three responses: anaphylactic, cytotoxic, and immune system hypersensitivity.
- Immunoglobulin : Proteins produced by lymphocytes, which are primarily antibodies to attack material the body considers hostile, although some may act as cytokines, signaling to other cells
- Leukocyte : Colourless cells of the immune system which defend the body against both infectious disease and foreign materials, and grouped into neutrophils, eosinophils, basophils, lymphocytes, and monocytes.
- List of organic compounds : Add brief definition or description
- Mast cell : Non-circulating, but leukocyte-like (especially basophil) associated with the inflammatory response, especially the release of histamine.
- Memory of water : A pseudoscientific concept, according to which water molecules can store information about the kind of molecules they had been in contact with.
- Neurotransmitter : A class of chemicals which relay, amplify or modulate electrical signals between a neuron and other cells in the nervous system.
- Phagocytosis : That part of immune response in which defensive cells such as neutrophils and macrophages surround and "digest" foreign particles
- Prodrug : A chemical compound that becomes metabolized into an active drug.
- Tricyclic antidepressant : Adrenergic uptake inhibitors used in the treatment of depression and other diseases; suppress postsynaptic catechol-O-methyl transferase, causing increases in synaptic norepinephrine and serotonin
- Vitamin C : Required by a few mammalian species, including humans and higher primates. It is water-soluble and is usually obtained by eating fruits and vegetables; associated with scurvy (hence its chemical name, ascorbic acid).