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Stress (biology)

Physiological or biological stress is an organism's response to a stressor such as an environmental condition. Stress is the body's method of reacting to a condition such as a threat, challenge or physical and psychological barrier. Stimuli that alter an organism's environment are responded to by multiple systems in the body. The autonomic nervous system and hypothalamic-pituitary-adrenal (HPA) axis are two major systems that respond to stress.

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Everyone understands the pressure from stress

Contributed by Liz Simmons

The physical reactions to stress can cause major breakouts, which, in turn, can be even more stressful!

Contributed by Rodolfo Salgado

When the body undergoes stress, cortisol, a glucocorticoid, is released from the adrenal cortex in response. As a result, the immune system is weakened which is why people often get sick when they're stressed because the body has redirected it's functional importance to the cause of stress. The body is more concerned with restoring the body to homeostasis or responding in a fight-or-flight method instead of immune function.

Contributed by Lauren Bandyk

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