leukocyte activation (GO:0045321)

A change in morphology and behavior of a leukocyte resulting from exposure to a specific antigen, mitogen, cytokine, cellular ligand, or soluble factor.

Specific

leukocyte activation involved in immune response (GO:0002366) leukocyte activation involved in inflammatory response (GO:0002269) leukocyte adhesive activation (GO:0050902) lymphocyte activation (GO:0046649) myeloid leukocyte activation (GO:0002274) plasmacytoid dendritic cell activation (GO:0002270)

General

immune system process (GO:0002376) cell activation (GO:0001775)

References

gene ontology: GO:0045321