chap 3- stress Flashcards
what is stress
the automatic psychological and physiological arousal a person experienced in response to challenges
what does psychobiological process mean
will respond to stressors psychologically and physiologically
what elements is stress a combination of
a stressor
and stress response
what is a stressor
a change in the immediate environment of an organism
what is stress response
how the organism responds to the stress in both a psychological and physiological way.
what are the types of stress
acute and chronic
What is acute stress
state of brief but intense physiological arousal in response to an immediate stressor.
Are there usually negative effects of acute stress
usually no negative effects on health and wellbeing
What is chronic stress
state of prolonged physiological arousal in response to persistent stressor
Are there usually negative effects of chronic stress
yes it negatively affects health and wellbeing
what is eustress
a positive psychological response
what is distress
a negative psychological response
how is stress response triggered
the activation of sympathetic NS, following the perception of a threat
What is the Fight-Flight response
the automatic reaction of the sympathetic NS to stress that prepares the body to confront or escape a threat
What is the Fight-Flight-Freeze response
the automatic activation of both the sympathetic and parasympathetic NS simultaneously, causing us to freeze.
What happens physiologically during the freeze response
heart rate decreases. blood pressure drops, heightened muscle tension, vocalizations are reduced, heightened tension and awareness.
What is the role of cortisol
release of cortisol during activation of the sympathetic NS mobilizes the body and increases arousal to respond to the stressor.
what does sustained levels of cortisol promote
the effects of adrenaline and noradrenaline, reduces inflammation, and repairs muscle tension.
why can too much cortisol be a bad thing
it can suppress the immune system and therefore cause health issues.
what is the process of cortisol
1- when stressor identified, hypothalamus is activated releasing CRH into bloodstream
2- CRH activates pituitary gland which releases ACTH
3- ACTH travels through blood stream to adrenal glands to trigger release of cortisol
4- cortisol promotes effects of adrenaline and noradrenaline
What is General Adaption syndrome
a model to describe the body’s typical response pattern in terms of resistance to stress over time
What is stage one of General adaptation syndrome, and what does it involve
Alarm Reaction:
initial decrease in our resistacbce to stress when threat is percieved followed by an increase to levels above normal
What are the two subphases of alarm reactions stage & what do they involve
1- Shock: resistance to stress drops below normal and body acts as though its injured.
2- countershock: resistance to stress rises above normal levels due to activation of sympathetic NS
What is stage two of General adaptation syndrome, and what does it involve
Resistance:
resistance to stress remains above normal levels if threat remains. arousal is higher than normal as body attempts to stabilize its internal systems and cope with the threat.
when can signs of illness occur in General adaptation syndrome
state 2 and stage 3
What is stage three of General adaptation syndrome, and what does it involve
exhaustion:
if original threat continues the body’s resources are drained and stress hormones depleted. compromised immune system functioning means body moves into a state of exhaustion and illness occurs.
what are symptoms of exhaustion stage of general adaptation syndrome
fatigue, anxiety, depression, disrupted sleeping