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GO:0009987
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cellular process
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Any process that is carried out at the cellular level, but not necessarily restricted to a single cell. For example, cell communication occurs among more than one cell, but occurs at the cellular level. |
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GO:0008150
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biological_process
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A biological process is the execution of a genetically-encoded biological module or program. It consists of all the steps required to achieve the specific biological objective of the module. A biological process is accomplished by a particular set of molecular functions carried out by specific gene products (or macromolecular complexes), often in a highly regulated manner and in a particular temporal sequence. |
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GO:0032501
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multicellular organismal process
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Any biological process, occurring at the level of a multicellular organism, pertinent to its function. |
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GO:0046649
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lymphocyte activation
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A change in morphology and behavior of a lymphocyte resulting from exposure to a specific antigen, mitogen, cytokine, chemokine, cellular ligand, or soluble factor. |
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GO:0045321
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leukocyte activation
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A change in morphology and behavior of a leukocyte resulting from exposure to a specific antigen, mitogen, cytokine, cellular ligand, or soluble factor. |
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GO:0001775
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cell activation
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A multicellular organismal process by which exposure to an activating factor such as a cellular or soluble ligand results in a change in the morphology or behavior of a cell. |
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GO:0002376
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immune system process
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Any process involved in the development or functioning of the immune system, an organismal system for calibrated responses to potential internal or invasive threats. |
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GO:0030101
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natural killer cell activation
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The change in morphology and behavior of a natural killer cell in response to a cytokine, chemokine, cellular ligand, or soluble factor. |
