The phenomenon of stress: Concepts and mechanisms associated with stress-induced responses of the neuroendocrine system |
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Authors: | B. Ann Becker |
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Affiliation: | (1) USDA-ARS Animal Physiology Research Unit, 65211 Columbia, MO, USA;(2) Present address: University of Missouri, 114, Animal Science Research Center, US Department of Agriculture, Agricultural Research Service, 65211 Columbia, MO, USA |
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Abstract: | Stress, stressors and the stress response are terms which represent concepts rather than oeing precisely definable. No single theory of stress has been universally accepted. Selye's General Adaptation Syndrome of stress remains the primary theory for the basis of stress research in food-producing animals; however, other concepts and theories have been developed. This paper reviews current theories and suggests that the complexity of research on stress in food-producing animals can be attributed to the lack of concrete theories and concepts regarding identifiable stressors, the endocrine responses stimulated by potential stressors and the complex and integrated biological changes in the neuro-endocrine system resulting from exposure to hypothesized stressors. |
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