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Stress, whether physiological, biological or psychological, is an organism's response to a stressor, such as an environmental condition or change in life circumstances. [ 1 ] [ 2 ] When stressed by stimuli that alter an organism's environment, multiple systems respond across the body. [ 1 ]
A stressor is a chemical or biological agent, environmental condition, external stimulus or an event seen as causing stress to an organism. [1] Psychologically speaking, a stressor can be events or environments that individuals might consider demanding, challenging, and/or threatening individual safety.
Chronic stress is the physiological or psychological response induced by a long-term internal or external stressor. [1] The stressor, either physically present or recollected, will produce the same effect and trigger a chronic stress response. [ 1 ]
Stress is a physiological reaction triggered by the perception of a threat or major life change. ... These are just examples. Many events, life circumstances, health issues, and other factors can ...
Homeostasis is the regulation of physiological processes, whereby systems in the body respond to the state of the body and to the external environment. [18] The relationship between allostasis and allostatic load is the concept of anticipation. Anticipation can drive the output of mediators. Examples of mediators include hormones and cortisol.
The threat of negative evaluation is the social stressor. Researchers can measure the stress response by comparing pre-stress salivary cortisol levels and post-stress salivary cortisol levels. [31] Other common stress measures used in the TSST are self-report measures like the State-Trait Anxiety Inventory and physiological measures like heart ...
Hans Selye defined stress as “the nonspecific (that is, common) result of any demand upon the body, be the effect mental or somatic.” [5] This includes the medical definition of stress as a physical demand and the colloquial definition of stress as a psychological demand. A stressor is inherently neutral meaning that the same stressor can ...
Stress is caused by internal or external influences that disrupt an individual's normal state of well-being. [10] These influences are capable of affecting health by causing emotional distress and leading to a variety of physiological changes. [4] Internal stressors include physiological conditions such as hunger, pain, illness or fatigue.