biological_process
 |__immune system process_________
cellular process                  |
 |__cell activation_______________|
multicellular organismal process  |
 |__cell activation_______________|
                                  leukocyte activation  2 rec.
                                   |__leukocyte activation involved in immune response
                                   |   |__basophil activation involved in immune response(+)
                                   |   |__lymphocyte activation involved in immune response(+)
                                   |   |__macrophage activation involved in immune response(+)
                                   |   |__myeloid cell activation involved in immune response(+)
                                   |   |__plasmacytoid dendritic cell activation involved in immune response(+)
                                   |__leukocyte activation involved in inflammatory response
                                   |   |__microglial cell activation(+)
                                   |__leukocyte adhesive activation
                                   |__lymphocyte activation
                                   |   |__B cell activation(+)
                                   |   |__establishment of lymphocyte polarity(+)
                                   |   |__immunological synapse formation(+)
                                   |   |__lymphocyte activation involved in immune response(+)
                                   |   |__lymphocyte differentiation(+)
                                   |   |__lymphocyte proliferation(+)
                                   |   |__natural killer cell activation(+)
                                   |   |__regulation of lymphocyte activation(+)
                                   |   |__T cell activation(+)
                                   |__myeloid leukocyte activation
                                   |   |__granulocyte activation(+)
                                   |   |__macrophage activation(+)
                                   |   |__mast cell activation(+)
                                   |   |__monocyte activation(+)
                                   |   |__myeloid cell activation involved in immune response(+)
                                   |   |__myeloid dendritic cell activation(+)
                                   |__plasmacytoid dendritic cell activation
                                   |   |__plasmacytoid dendritic cell activation involved in immune response(+)
                                   |   |__plasmacytoid dendritic cell differentiation(+)
                                   |__regulation of leukocyte activation
                                       |__negative regulation of leukocyte activation(+)
                                       |__positive regulation of leukocyte activation(+)
                                       |__regulation of eosinophil activation(+)
                                       |__regulation of lymphocyte activation(+)
                                       |__regulation of macrophage activation(+)
                                       |__regulation of mast cell activation(+)
                                       |__regulation of myeloid dendritic cell activation(+)
                                       |__regulation of neutrophil activation(+)