Biology

Biology

A natural science concerned with the study of life or living matter in all its forms and phenomena, especially in relation to their origin, growth, reproduction, structure, behaviour and evolution.

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Biology > Immunology

contact hypersensitivity

Biology; Immunology

A form of delayed-type hypersensitivity (type IV) in which T cells respond to antigens that are introduced by contact with the skin. Poison ivy hypersensitivity is a contact ...

convertase

Biology; Immunology

An enzymatic activity that converts a complement protein into its reactive form by cleaving it. Generation of the C3/C5 convertase is the pivotal event in complement activation.

Coombs test

Biology; Immunology

A test named for its originator, R.R.A. Coombs, used to detect antibodies by addition of an anti-immunoglobulin antibody.

corticosteroids

Biology; Immunology

are steroid hormones (e.g. cortisone) that are lympholytic and are derived from the adrenal cortex. Glucocorticoids such as prednisone or dexamethasone can diminish the size and ...

costimulatory molecules

Biology; Immunology

Membrane-bound or secreted products of accessory cells that activate signal transduction events in addition to those induced by MHC/TCR interactions. They are required for full ...

C-reactive protein (CRP)

Biology; Immunology

is a serum protein produced by liver cells as part of the acute phase response. It binds to phosphatidylcholine, a component of the surface of many bacteria. As a result of CRP ...

cromolyn sodium

Biology; Immunology

A drug that blocks the release of pharmacological mediators from mast cells and diminishes the symptoms and tissue reactions of type I hypersensitivity (i.e., anaphylaxis) ...