The Body's Response to Stress - Biological Psychology AS (3)

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THE SYMPATHOMEDULLARY PATHWAY

This system uses electricity (i.e. communication along nerve fibres) and is very fast indeed, faster than the chemical-based pituitary-adrenal system.

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HOW IT WORKS

•Hypothalamus activates sympathetic branch of the ANS.

The sympathetic branch sends a signal to the adrenal medulla.

In response, the adrenal medulla releases adrenaline and noradrenaline.

These contribute to the stress response e.g. increasing blood pressure and heart rate.

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Comments

Ava

thanks

Pye

brilliant :)

jethro

i can never remember this :S

Jacki

cool

Smile!

great

WhatsHisFace

Really useful, thanks :)

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