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Schematic overview of the classes of stresses in plants Neurohormonal response to stress. Stress, whether physiological, biological or psychological, is an organism's response to a stressor such as an environmental condition. [1] When stressed by stimuli that alter an organism's environment, multiple systems respond across the body. [2]
Trauma and stress experienced by a parent can cause epigenetic changes to its offspring. This has been observed both in population and experimental studies. [20] Biological vulnerability and HPA axis alterations may be observed after maternal epigenetic programing during pregnancy, leading to similar modifications in future generations. [21]
Frequent stress: the magnitude and frequency of response to stress is what determines the level of allostatic load which affects the body. Failed shut-down: the inability of the body to shut off while stress accelerates and levels in the body exceed normal levels, for example, elevated blood pressure.
Research published in 2023 in the journal Cell Metabolism showed that biological age fluctuates in humans, and such wear and tear caused by stress can be reversed through recovery.
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.
Cellular stress response is the wide range of molecular changes that cells undergo in response to environmental stressors, including extremes of temperature, exposure to toxins, and mechanical damage. Cellular stress responses can also be caused by some viral infections. [1]
A study about stress effects on female songbird’s response to sexual signal for mating indicated that the response to this specific signal can be impaired if the female is exposed to developmental stress. Behavioural changes as a result from developmental stress impairs neural responses to sexual signals, which reduces mating. [5]
Hans Selye's original concept of stress as a biological process has had an enormously stimulating effect on many areas of medicine and biology over the past seventy years, and continues to shape how people understand stress today. [6]