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Hormesis is a biological phenomenon where a low dose of a potentially harmful stressor, such as a toxin or environmental factor, stimulates a beneficial adaptive response in an organism. In other words, small doses of stressors that would be damaging in larger amounts can actually enhance resilience, stimulate growth, or improve health at lower ...
Stress ulceration is a single or multiple fundic mucosal ulcers that causes upper gastrointestinal bleeding, and develops during the severe physiologic stress of serious illness. It can also cause mucosal erosions and superficial hemorrhages in patients who are critically ill, or in those who are under extreme physiologic stress, causing blood ...
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 ...
Some experts have theorized that there is a point where prolonged or excessive stress becomes harmful and can lead to serious health effects. [4] When stress builds up in early childhood, neurobiological factors are affected. [1] In turn, levels of the stress hormone cortisol exceed normal ranges. [1]
Prolonged stress can disturb the immune, digestive, cardiovascular, sleep, and reproductive systems. [17] For example, it was found that: Chronic stress reduces resistance of infection and inflammation, and might even cause the immune system to attack itself. [27] Stress responses can cause atrophy of muscles and increases in blood pressure. [28]
The images in question include a picture of a woman with a large growth on her neck and the caption “WARNING: Smoking causes head and neck cancer.” Another shows a man's chest with a long scar ...
One example of an aggressive intrusive thought is the high place phenomenon, the sudden urge to jump from a high place. A 2011 study assessed the prevalence of this phenomenon among US college students; it found that even among those participants with no history of suicidal ideation, over 50% had experienced an urge to jump or imagined ...
Abiotic stress is the negative impact of non-living factors on the living organisms in a specific environment. [1] The non-living variable must influence the environment beyond its normal range of variation to adversely affect the population performance or individual physiology of the organism in a significant way.