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

anaphylaxis

Biology; Immunology

Immediate hypersensitivity response to antigenic challenge, mediated by IgE and mast cells. It is a life-threatening allergic reaction, caused by the release of pharmacologically ...

anergy

Biology; Immunology

A state of antigen-specific nonresponsiveness in which a T or B cell is present but functionally unable to respond to antigen.

ankylosing spondylitis

Biology; Immunology

A chronic inflammatory disease affecting the spine, sacroiliac joints, and large peripheral joints. There is a major genetic predisposition, as revealed by increased incidence in ...

antibody

Biology; Immunology

Serum protein formed in response to immunization; antibodies are generally defined in terms of their specific binding to the immunizing antigen.

antibody-dependent, cell-mediated cytotoxicity (ADCC)

Biology; Immunology

A phenomenon in which target cells, coated with antibody, are destroyed by specialized killer cells (NK cells and macrophages), which bear receptors for the Fc portion of the ...

antigen

Biology; Immunology

Any foreign material that is specifically bound by antibody or lymphocytes; also used loosely to describe materials used for immunization. Compare with immunogen.

antigen presentation

Biology; Immunology

The display of antigen as peptide fragments bound to MHC molecules on the surface of a cell; T cells recognize antigen only when it is presented in this way.