The Body's Stress Response Mechanisms
- Created by: Rachael
- Created on: 14-12-12 20:22
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- The Body's Stress Response Mechanisms
- Hypothalamic Pituitary Adrenal (HPA) System
- Chemical-based system and is not as fast as symathomedullary pathway
- 1) Stressor sensed in hypothalamus
- 2) Signals pituitary gland to secrete ACTH
- 3) Adrenal cortex detects ACTH and releases corticosteroids
- This helps blood to clot and influences sugar and salt levels in the blood
- 3) Adrenal cortex detects ACTH and releases corticosteroids
- 2) Signals pituitary gland to secrete ACTH
- The Sympathomedullary pathway
- Uses electricity and is very fast
- 1) Hypothalamus activates sympathetic branch of the ANS
- 2) The sympathetic branch sends a signal to the adrenal medulla
- 3) The adrenal medulla releases adrenaline and noradrenaline
- 4) These contribute to the stress response e.g increasing blood pressure and heart rate
- 3) The adrenal medulla releases adrenaline and noradrenaline
- 2) The sympathetic branch sends a signal to the adrenal medulla
- Hypothalamic Pituitary Adrenal (HPA) System
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