obsolete exposure event or process 2017-06-05T17:55:39Z An exposure event in which a plant is provided with fertilizer. The exposure receptor is the root system of the plant, the stimulus is the fertilizing chemical, the route is via the soil, possibly mediated by symbotic microbes. https://github.com/oborel/obo-relations/pull/173 true This class is intended as a grouping for various domain and species-specific exposure classes. The ExO class http://purl.obolibrary.org/obo/ExO_0000002 'exposure event' assumes that all exposures involve stressors, which limits the applicability of this class to 'positive' exposures, e.g. exposing a plant to beneficial growing conditions. An exposure event in which a human is exposed to particulate matter in the air. Here the exposure stimulus/stress is the particulate matter, the receptor is the airways and lungs of the human, OBSOLETE A process occurring within or in the vicinity of an organism that exerts some causal influence on the organism via the interaction between an exposure stimulus and an exposure receptor. The exposure stimulus may be a process, material entity or condition (for example, lack of nutrients). The exposure receptor can be an organism, organism population or a part of an organism. Christopher J. Mungall