Biopsychology - The fight or flight response including the role of adrenaline Flashcards
In fight or flight response when a stressor is perceived what is triggered?
Hypothalamus triggers activity
In fight or flight response when a stressor is perceived what happens to the autonomic nervous system?
It changes from its parasympathetic resting state to sympathetic state
Where is adrenaline released from when the sympathetic nervous system triggers arousal?
Adrenal gland
What other hormone is released from the adrenal gland?
Cortisol
What affect does cortisol have on the body?
It helps provide that boost of energy when we first encounter a stressor, preparing us to run away or fight.
But sustained elevated levels of cortisol weaken the immune system.
In fight or flight response when a stressor is perceived what happens to the autonomic nervous system?
It changes from its parasympathetic resting state to sympathetic state
What impact does adrenaline have on the body?
Strong effect on the cells in the cardiovascular system - simulates heart rate, contracts blood vessels and dilates air passages which creates the physiological arousal for fight or flight response.
What impact does adrenaline have on the body?
Strong effect on the cells in the cardiovascular system - simulates heart rate, contracts blood vessels and dilates air passages which creates the physiological arousal for fight or flight response.
What biological changes are associated with sympathetic responses?
Increases heart rate Increases breathing rate Dilates pupils Inhibits digestion Inhibits saliva production Contracts rectum
What biological changes are associated with parasympathetic responses?
Decreases heart rate Decreases breathing rate Constricts pupils Stimulates digestion Stimulates saliva production Relaxes rectum
What happens once a threat has passed in the fight or flight response?
The parasympathetic returns the body to its resting state.
