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Stress is a biological and psychological response experienced on encountering a threat that we feel
we do not have the resources to deal with.

A stressor is a stimulus (or threat) that causes stress e.g. exam, death of a loved one, moving house,
loss of a job.

Sudden severe stress…

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The hypothalamus also activates the adrenal medulla. The adrenal medulla is part of the autonomic
nervous system (ANS).

The ANS is the part of the peripheral nervous system that acts as a control system, maintaining
homeostasis in the body. These activities are generally performed without conscious control.

The adrenal medulla…

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