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Physiological stress represents a wide range of physical responses that occur as a direct effect of a stressor causing an upset in the homeostasis of the body. Upon immediate disruption of either psychological or physical equilibrium the body responds by stimulating the nervous , endocrine , and immune systems .
Rather than causing us to store anger in our back, or fear in our stomach, stress triggers a dynamic whole-body response—and it happens not just when people repress their emotions, but even if ...
To measure the body's response to stress, psychologists tend to use Hans Selye's general adaptation syndrome. This biological model, often referred to as the "classic stress response", revolves around the concept of homeostasis. General adaptive syndrome, according to this system, occurs in three stages: The alarm reaction. This stage occurs ...
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.
Stress is a physiological reaction triggered by the perception of a threat or stressor. Under stress, your body activates a complex cascade of hormonal and neurological processes to prepare you to ...
The sympathetic branch of the autonomic nervous system gives rise to a specific set of physiological responses to physical or psychological stress. The body's response to stress is also termed a "fight or flight" response, and it is characterised by an increase in blood flow to the skeletal muscles, heart, and brain, a rise in heart rate and ...
The sympathetic nervous system is described as being antagonistic to the parasympathetic nervous system. The latter stimulates the body to "feed and breed" and to (then) "rest-and-digest". The SNS has a major role in various physiological processes such as blood glucose levels, body temperature, cardiac output, and immune system function.
Once the stressor is resolved, the body resumes to amounting an adequate immune and inflammatory response, which may explain why it is often seen that a person falls ill after acute stress. Due to the interconnected nature of the brain's regulation of stress, the immune system, and the endocrine system, allostasis may play a role in the ...