Source:http://linkedlifedata.com/resource/umls/id/C2246362
GO: A change in the morphology or behavior of a keratinocyte resulting from exposure to an activating factor such as a cellular or soluble ligand. Upon activation, keratinocytes become migratory and hyperproliferative, and produce growth factors and cytokines. [GOC:mah, PMID:15737202]