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							|  | Mast cell:
 a connective tissue cell that contains histamine that is released during allergic reactions.
 
 Mediator:
 an object or substance through which an effect is obtained; e.g. histamine is one mediator of anaphylaxis.
 
 Medic-Alert®:
 The Canadian Medic Alert® Foundation houses a registry of medical information for its members that can be called upon in an emergency. It provides bracelets and necktags inscribed with specific information and their phone number.
 
 Metabolite:
 any substance produced by metabolism (the transformation by which energy is made available for the use of an organism).
 
 
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