Also called the SAM;
A stressor is percieved
The sympthetic branch of the autonomic nervous system is stimulated
The adrenal medulla releases both adrenalin and nor-adrenalin
Heart rate, blood pressure, oxygen and glucose levels increase
Digestion is surpressed
This pathway is activated when a sudden stressor occurs such as crossing the road and a car comes speeding down without you realising.
This response is called the fight or flight response.
Hypothalamic Pituitary Adrenal Pathway
Also called the HPA;
The pituitary gland releases ACTH (Adreno-corticotrophic hormone)
The adrenal cortex produces cortisol
This stimulates the liver to release stored glucose
The immune system is surpressed
This pathway is activated when chronic stressors occur.