Psychobiology of stress UNFINISHED

Question 1

Stress mechanisms

Answer 1

Hypothalamus stimulated
Pathway 1 - sympathetic adrenal medullary axis
Pathway 2- hypothalamic pituitary adrenal axis
stimulated at same time in hypothalamus
output is both adrenal gland that releases cortisol and adrenaline

Question 2

Sympathetic Adrenal Medullary Axis

Answer 2

SAM Axis
hypothalamus stimulated
travels through sympathetic nervous system
triggers the adrenal medulla to release adrenaline

Question 3

Adrenaline

Answer 3

Increases heart rate
increase blood pressure
Redirects blood to muscle/organs

Question 4

Hypothalamic Pituitary Adrenal Axis

Answer 4

HPA Axis
Hypothalamus stimulated
releases corticotropin releasing hormone (CRH)
CRH stimulates Pituitary gland to release ACTH
ACTH stimulates adrenal cortex to release cortisol

Question 5

Cortisol

Answer 5

Maintains fight/flight response
Increase sensitivity of cells to adrenaline & noradrenaline
increase blood sugar
increase mental alertness
Also switches off long term processes like immune system, growth & repair, digestion, reproduction, sleep regulation