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TO DESCRIBE THE BODY'S RESPONSE TO STRESS
Stress results in the hypothalamus in the
brain activating 2 pathways in the body
1. Sympathetic-adrenomedullary
(SAM) pathway
2. Hypothalamic-pituitary-adrenal
(HPA) axis…read more

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TO DESCRIBE THE BODY'S RESPONSE TO STRESS
SYMPATHETIC-ADRENOMEDULLARY (SAM) PATHWAY
The hypothalamus activates the sympathetic
nervous system.
The nerve pathways stimulate the adrenal
medulla in the adrenal glands.
This causes adrenaline, a hormone, to be
released into the bloodstream.
Adrenaline prepares the body for the fight or
flight response.
The heart and breathing rates increase to
provide the body with extra oxygen.…read more

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TO DESCRIBE THE BODY'S RESPONSE TO STRESS
HYPOTHALAMIC-PITUITARY-ADRENAL AXIS (HPA)
The hypothalamus also triggers the pituitary
gland to release adrenocorticotrophic
hormone (ACTH) into the bloodstream.
This stimulates the adrenal cortex in the
adrenal glands to produce the hormone
cortisol.
Cortisol is needed to release stored glucose
to provide the body with extra energy to
deal with the stressful situation.…read more

Slide 5

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TO DESCRIBE THE BODY'S RESPONSE TO STRESS
The stress response has 3 stages
1. Sympathetic-adrenomedullary (SAM)
pathway releases adrenaline
immediately to produce the fight or
flight response
2. Hypothalamic-pituitary-adrenal
(HPA) axis releases cortisol to help
the body cope with long term stress
3. The body becomes exhausted and
health problems develop…read more

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TO DESCRIBE AND EVALUATE RESEARCH INTO STRESS & ILLNESS
STRESS & THE IMMUNE SYSTEM
STUDY BY COHEN
Participants were given a stress index score.
This was based on the number of stressful life
events they had experienced in the previous 12
months and how stressed and depressed they
felt.
They were then exposed to the common cold virus
and observed for symptoms.
Participants with a high score on the stress index
were more likely to become ill.
Stressful life events and negative emotions reduce
the functioning of the immune system.…read more

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