The Body's response to stress


The Body’s response to stress

Acute stress starts off autonomic nervous system (ANS) = governs themselves

Body functions controlled. Without ANS body would have to think about controlling the bodily functions too much.

Autonomic nervous system is split into two sections: the sympathetic branch (sympathetic nervous system or SNS) and the parasympathetic branch.

SNS- sympathetic branch- arouses the fight of flight response.

Key part of this system is the Sympathetic adrenal medullary (SAM)

SNS + SAM = sympathomedullary pathway

Neurons from the SNS travel to every organ and gland preparing for rapid action if the animal/person becomes under threat.

Eg. Increased heart rate, increased blood pressure, increased pupil size, metabolic changes: mobilisation of fat and glycogen into the blood stream. = Noradrenaline is the neurotransmitter released by the SNS to activate these changes.

SAM- sympathetic adrenal medullary

The SAM system alerts animal through the release of adrenaline, this is done at the same time of the activation of the SNS. This is the body preparing for the flight or fight response.

The SAM system is regulated through the SNS and the adrenal medulla.

Adrenal medulla

 An Adrenal gland has two distinct zones: the


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