The Pituitary Adrenal System

Question 1

What type of stress activates PAS?

Answer 1

Chronic

Question 2

What types of stressors can activate PAS?

Answer 2

Emotional and physical, on-going stressors

Question 3

What are the 5 stages of PAS?

Answer 3

1. On-going stressor activates the hypothalamus which releases CRF (Corticotrophin Releasing Factor) which travels to the Pituitary gland
2. The Pituitary gland secretes Adrenocorticotrophin Hormone (ACTH)
3. ACTH stimulates the adrenal cortex to produce the hormone cortisol
4. Cortisol enables the body to maintain steady supplies of blood sugar (energy)
5. Adequate and steady blood sugar levels allow a person to cope with a prolonged stressor