Biological Response to Stress

Short and long term response to stress 

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  • Created by: Anomea
  • Created on: 28-11-13 19:01
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Biological Response to Stress
Sympathomedullary pathway (SMP)- Short term stress
Stressor is perceived by sense organs
Sends a nervous message to hypothalamus
Hypothalamus sends nervous message to sympathetic nervous system
In turns sends nervous message to the adrenal Medullar
Adrenal Medullar secretes adrenaline and noradrenaline into the bloodstream
This then prepare body for `fight or flight' response
Pituitary Adrenal System (PAS) ­ Long term stress
Continuous stressors over a period of time alert hypothalamus
Stimulates hypothalamus to release corticotrophin-releasing hormone (CRH) into
Stimulates anterior pituitary to release adrenocorticotropic hormone into bloodstream
Triggers adrenal cortex to produce cortisol
Cortisol permits a steady supply of blood sugar, provides individual with constant source
of energy. Also means you can tolerate more pain

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Similarities Differences
Both focus around hypothalamus SMP short term, PAS long term
Both go to the adrenal gland, however Release different hormones ­ SMP is
different areas. adrenaline + noradrenaline, PAS is
PAS bypasses the sympathomedullary
pathway.…read more



really clear, the diagram helps a lot. thanks 

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