Psychobiology of stress UNFINISHED Flashcards

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1
Q

Stress mechanisms

A

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

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2
Q

Sympathetic Adrenal Medullary Axis

A

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

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3
Q

Adrenaline

A

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

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4
Q

Hypothalamic Pituitary Adrenal Axis

A

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

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5
Q

Cortisol

A

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

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