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mast cell activation (GO:0045576)
The change in morphology and behavior of a mast cell resulting from exposure to a cytokine, chemokine, soluble factor, or to (at least in mammals) an antigen which the mast cell has specifically bound via IgE bound to Fc-epsilonRI receptors
Specific
mast cell activation involved in immune response (GO:0002279)
General
myeloid leukocyte activation (GO:0002274)
References
gene ontology: GO:0045576