Stress is an innate, defensive response to situations that threaten survival.
The bodily response to stress can be explained by looking at:
- -The role of the autonomic nervous system and
- -The hypothalamic-pituitary-adrenocortical axis. However, the beneficial effects of activity in this system (described below) are achieved at much cost, and it cannot continue indefinitely at an elevated level of activity.
Continued stress can deplete our resources and may lead to illness.
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