"The regulated release of serotonin by a cell or group of cells. Serotonin (5-hydroxytryptamine, or 5-HT) is a monoamine synthesised in serotonergic neurons in the central nervous system, enterochromaffin cells in the gastrointestinal tract and some immune system cells [goid 1820] [evidence IEA]; The aggregation, arrangement and bonding together of a set of components to form a protein complex [goid 6461] [pmid 8163536] [evidence TAS]; The attachment of a leukocyte to another cell via adhesion molecules [goid 7159] [pmid 12885943] [evidence IDA]; Any series of molecular signals initiated by the binding of an extracellular ligand to a receptor on the surface of the target cell, where the receptor possesses catalytic activity or is closely associated with an enzyme such as a protein kinase [goid 7167] [evidence IEA]; Any series of molecular signals generated as a consequence of an integrin binding to one of its physiological ligands [goid 7229] [pmid 12885943] [evidence NAS]; A series of reactions within the cell that occur as a result of a single trigger reaction or compound [goid 7242] [evidence IEA]; The initiation of the activity of the inactive enzyme JUN kinase by phosphorylation by a JUN kinase kinase (JNKK) [goid 7257] [evidence IEA]; The multiplication or reproduction of cells, resulting in the expansion of a cell population [goid 8283] [pmid 10963601] [evidence TAS]; Morphogenesis of an organ. An organ is defined as a tissue or set of tissues that work together to perform a specific function or functions. Morphogenesis is the process by which anatomical structures are generated and organized. Organs are commonly observed as visibly distinct structures, but may also exist as loosely associated clusters of cells that work together to perform a specific function or functions [goid 9887] [pmid 7477352] [evidence TAS]; The chemical reactions and pathways resulting in the formation of leukotriene, a pharmacologically active substance derived from a polyunsaturated fatty acid, such as arachidonic acid [goid 19370] [evidence IEA]; The directed movement of a neutrophil cell, the most numerous polymorphonuclear leukocyte found in the blood, in response to an external stimulus, usually an infection or wounding [goid 30593] [pmid 12885943] [evidence IDA]; Any process that activates or increases the frequency, rate or extent of mast cell degranulation [goid 43306] [evidence IEA]; The process by which successful recombination of a T cell receptor beta chain into a translatable protein coding sequence leads to rescue from apoptosis and subsequent proliferation of an immature T cell [goid 43366] [evidence IEA]; Any process by which an organism has an effect on an organism of a different species [goid 44419] [evidence IEA]; Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of interleukin-3 [goid 45401] [evidence IEA]; Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of granulocyte macrophage colony-stimulating factor [goid 45425] [evidence IEA]; Any process that activates or increases the frequency, rate or extent of B cell differentiation [goid 45579] [evidence IEA]; Any process that activates or increases the frequency, rate or extent of gamma-delta T cell differentiation [goid 45588] [evidence IEA]; Any process that activates or increases the frequency, rate or extent of alpha-beta T cell differentiation [goid 46638] [evidence IEA]; Any process that activates or increases the frequency, rate or extent of alpha-beta T cell proliferation [goid 46641] [evidence IEA]; The phosphorylation by a protein of one or more of its own amino acid residues, or residues on an identical protein [goid 46777] [evidence IEA]; Any process that activates or increases the frequency, rate or extent of the phosphorylation of peptidyl-tyrosine [goid 50731] [evidence IEA]; Any process that activates or increases the frequency, rate or extent of calcium-mediated signaling [goid 50850] [evidence IEA]; A series of molecular signals initiated by the cross-linking of an antigen receptor on a B cell [goid 50853] [evidence IEA]"