Chapter 3: Stress Flashcards

(54 cards)

1
Q

gl

Stress

A
  • A physiological and psychological response produced by internal or external stressors
  • One is considered to be in a state of stress when they experiences intense (acute) / prolonged (chronic) arousal

NOTE: Arousal refers to an individual’s state of alertness.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Eustress vs distress

A
  • Eustresspositive psychological state
    • Can result in motivation, determination, excitedness
    • Improves focus, perfomance and memory
    • ↑ physiological arousal due to +ve resp to stressor
  • Distressnegative psychological state
    • Can result in anxiety and frustration
    • Impairs focus, performance and memory
    • Decreases energy over an extended period of time
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Stressor

A
  • Any stimulus that produces stress
  • Highly subjective
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Internal and external stressors

A
  • Internal – originate within the individual
    • Personal perception of events/biological responses
    • E.g. attitude, low self-esteem, ilness, sleep deprivation, NS dysfunction
  • External – originate outside the individual
    • Stimulation from interaction with the environment
    • E.g. exams, finance, long working hours, alcohol
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Psychological stress responses

A
  • Behavioural – changes in eating and sleeping habits
  • Emotional – irritability and aggression
  • Cognitive – ↓ concentration and impaired memory
  • Involves the hypothalamic-pituitary-adrenal (HPA) axis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Physiological vs psychological stress responses

A
  • Physiologicalbody
    • E.g. heart palpitations, dizziness, fevers
  • Psychologicalbehaviour, emotion, cognitions
    • E.g. mood swings, changes in sleep
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Acute stress

A
  • Lasts for a relatively short time
  • Governed by the hormone adrenaline
  • Benefits – adrenaline release can enhance problem-solving abilities or physical performance
  • Risks – elevated blood pressure or reduced motivation to persist with a task
  • E.g. exams, starting a new job, deadlines
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Chronic stress

A
  • Continues for a prolonged period of time
  • Governed by the hormone cortisol
  • Stressor doesn’t need to remain physically present to have its effects (recollections of the stressor can sustain chronic stress)
  • Associated with long-lasting pressures and worries
  • E.g. grief, long-term unemployment, social isolation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Stress hormones

A
  • Adrenaline and noradrenaline
    • Aka epinephrine and norephinephrine
    • Circulate the blood to activate organs (e.g. lungs)
    • ↑ physiological processes to prepare body for action
  • Cortisol is the most abundant of these hormones
    • Energises the body by ↑ energy supply and enhancing metabolism in the long term
    • Acts slower and has prolonged effects
    • Prepares the body for action and maintains its high levels of alertness
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Fight-or-flight-or-freeze response

A
  • Involuntary response to a stressful situation in readiness for:
    • Confronting the threat (fight)
    • Running away to safety (flight)
    • Staying still and silent to avoid detection (freeze)
  • The body is quickly energised to react to a threat/emergency
  • Occur automatically but can be conditioned/learnt
  • Enable us to deal with threats to help minimise harm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Fight or flight response

A
  • Initiated by the sympathetic NS and stress hormones
  • Energy from non-essential body systems directed to those that facilitate a fight or flight response
  • Can be adaptive or not adaptive
  • Involves a two-step process
  • Both the sympathetic and parasympathetic NS are activated when considering as an initial unitary response
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Two components of the fight or flight response

A
  • Part 1 (acute)
    • Amygdala detects the threat and sends a signal to the hypothalamus
    • Hypothalamus activates the sympathetic NS which then stimulates the adrenal medulla
    • Adrenal glands secrete adrenaline and noradrenaline into the bloodstream
    • Organs and other physiological processes are activated to prepare the body for action
  • Part 2 (chronic)
    • Hypothalamus stimulates the pituitary gland
    • Pituitary gland releases hormones to stimulate adrenal glands
    • Adrenal glands secrete cortisol to sustain the body’s high level of alertness
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Adaptive responses

A
  • Contribute to the survival of an organism
  • Automatic reaction to immediate threat (minimises harm)
  • E.g. Prey can remain frozen to avoid detection by a predator (the frozen state also conserves energy, allowing the organism to use the saved energy to escape when the predator loses interest)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Examples of when the fight or flight response is adaptive and not adaptive

A
  • Adaptive – immediately running during a fire to enhance survival
  • Not adaptive – absence from an important exam
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Physiological changes during fight or flight response

A
  • Sympathetic NS is dominant
  • Adrenal G secrete adrenaline, noradrenaline & cortisol
  • Increased heart rate and blood pressure
  • Blood from skin & intestines redistributed to skeletal M
  • Increased glucose secretion by the liver for energy
  • Dilation of the pupils allowing eyes to take in more light
  • Increased breathing rate for more oxygen
  • Bodily functions (e.g. digestion) suppressed to conserve energy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Freeze response

A
  • Remaining motionless due to no apparent chance of successfully fighting or escaping
  • Parasympathetic dominance contributes to immobility
  • Can occur before the body initiates a fight / flight response
  • Can be adaptive / not adaptive
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Examples of when the freeze response is adaptive and not adaptive

A
  • Adaptive – immobility to prevent detection by predator
  • Not adaptive – freezing when sitting a job interview

NOTE: Details about ‘tonic immobility’ are not required and should not be considered synonymous with the ‘freeze’ response.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Physiological changes during freeze response

A
  • Immobility – tense muscles collapse and become still
  • Hypervigilance – being on guard, watchful and alert
  • Cessation of vocalisations
  • Rapid drop in heart rate and blood pressure
  • Orienting response of head / eyes toward the threat
  • High arousal, alertness and tension (FAQs)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Cortisol

A
  • Considered to be the primary stress hormone
  • Acts slower and has longer lasting effects compared to other stress hormones
  • Helps keep the body at an elevated level of arousal, allowing the body to deal with stress for a prolonged period of time
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Cortisol’s role in chronic stress

A
  • Increase/maintain high blood sugar level
  • Enhance energy to keep the body in an elevated and energised state
  • Suppression of immune system (can weaken it)
  • Reduce inflammation by blocking the activity of white blood cells
  • Suppress bodily systems not immediately required to deal with a stressor
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Healthy stress response (cortisol)

A
  • Quick rise in cortisol levels followed by a rapid decline upon the termination of the stressful event
  • Energises the body (↑ energy and enhances metabolism)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Unhealthy stress response (cortisol)

A
  • When continuously released, cortisol degrades the immune system which depletes the body’s resources making it vulnerable to illness and disease
  • Cortisol ↑ appetite which is associated with weight gain
23
Q

The gut–brain axis (GBA)

A
  • A bidirectional communication link between the central and enteric nervous system
  • Includes the brain, spinal cord, ANS and HPA axis
  • Functions independent of the CNS
24
Q

Bidirectional relationship of the gut and the brain

A
  • Stress / anxiety
    • Messages from the brain lead to an upset stomach/digestive dysfunction
    • Can imbalance / disturb the gut microbiome
  • Gut dysbiosis (imbalance in gut microbiota)
    • Unhealthy gut leads to greater vulnerability to stress
    • Can disturb production of mood-stabilising neurotransmitters (e.g. serotonin)
    • Can create mood / motivational issues

NOTE: Conversely, good intestinal health can improve cognitive and emotional functioning of the brain.

25
The gut (microbiome) | 'Second brain'
- **Communicates w brain** to influence the body's health - Unique and affected by internal and external factors - Contains microbiota (bacteria, fungi, viruses, biotics) - These factors include diet, disease, lifestyle and nutrition - Diversity of the gut microbiota decreases with age - Known to produce & release NTS (e.g. GABA, serotonin, dop)
26
Enterotype
- Refers to the **unique combination of the gut microbiota** we each possess
27
Healthy gut
- **Large microbiota population** with **high diversity** - Resistant to disturbances (e.g. antibiotics, poor diet)
28
Gut dysbiosis / unbalanced gut microbiome
- **Unbalanced number or type of microbiota** - Associated w changes in NT production and activity in NS - Associated w digestive disorders (e.g. IBS), inflammatory diseases, infections and poor cognitive function
29
Improving gut health
- Consuming **probiotics** (”good” bacteria) via supplements, pickles, kimchi, yogurt - Healthy **faecal microbiotal transplants** ## Footnote NOTE: Improving gut health is beneficial in managing gut relates issues such as stress.
30
Explanatory power
- The ability to **explain concepts effectively** - A theory / model with high explanatory power: - Explains or **accounts for more observations** - Makes **fewer assumptions** - Is more **falsifiable** (open to criticism / further testing) - Provides more details of **cause-and-effect relationship**
31
General Adaptation Syndrome (GAS)
- **Biological** model of stress developed by **Hans Seyle** - A **three-stage physiological response** to stress involving alarm (shock/countershock), resistance and exhaustion - **Non-specific** (occurs regardless of the type of stressor) - Suggests a pattern to all experiences of stress, including eustress and distress - Identical within all members of the same species, in this case rats ## Footnote TIP: SCARE = shock, countershock, alarm, resistance and exhaustion.
32
Stage 1: Alarm reaction | (GAS)
- Comprised of two sub-stages: shock and counter shock - **Shock** – **temporary state of shock** where the **body’s ability to cope w stressor briefly falls** below normal - Drop in body temperature, blood pressure, muscle tone and loss of fluid in body tissues - Can involve fainting / heart attack - Occurs upon initial exposure to the stressor - **Counter shock** – **rebound reaction** where the **body’s ability to cope w stressor increases** - Sympathetic NS activated (initiates FF response) - Adrenaline, noradrenaline, cortisol and other stress hormones released into the blood stream - ↑ heart and breathing rate, arousal and energy (glucose and oxygen) supplied to muscles
33
Stage 2: Resistance | (GAS)
- Body’s **resistance to the stressor rises above normal** - **Cortisol continues to be released** (further energises body & helps repair any damages that may have occurred) - **Reduced resistance to illness / disease** due to cortisol weakening the immune system - **Physiological arousal remains above normal** but intense arousal from stage 1 diminishes - **Unnecessary processes are supressed** to maximise resources to cope with the stressor (digestion, sex drive, menstruation, production of sperm) - **Person can still feel well** and able to perform daily taks - If the stressor is successfully dealt with in this stage, the body returns to its homeostatic state - Cortisol has immunosuppressive effects (can become ill)
34
Stage 3: Exhaustion | (GAS)
- Body **can no longer maintain resistance** if the stressor is not successfully dealt with in the resistance stage - **Resources are depleted**, leaving the body **weak and vulnerable** to physical and mental disorders - Evidenced by fatigue, sleep disturbances, severe concentration loss, irritability and a depressed mood
35
Strengths of the GAS
- Explains the **immediate and long-term effects** of stress with reference to research - Established **links between chronic stress & disease** (e.g. prolonged stress can ↑ likelihood of illness) - Identifies **biological processes** associated with the body’s stress response (e.g. roles of endocrine system) - Highlights the **predictable pattern of chronic stress** which can be easily tested in a lab - Results also showed that prolonged stress can lead to death in lab rats
36
Limitations of the GAS
- **Does not consider individual response differences** (diff people have diff responses to same stressor) - **Based on animal research** and may therefore be of limited relevance to human stress response (rats have a simpler NS and therefore a less varied stress response) - **Does not consider environmental factors** (e.g. social support) that can exacerbate / mitigate stress - **Temporal validity** (does not consider new information) ## Footnote NOTE: Specifically apply limitation to question.
37
Psychological stress influences
- **What the event means to an individual** - **Individual judgment of their ability to cope** - Prior experiences - Personality/attitude - Optimism/pessimism - Motivations and goals - General life oulook ## Footnote NOTE: Lazarus and Folkman identified the first two points as the main factors that determine the extent to which an event is experienced as stressful.
38
Transactional Model of Stress and Coping (TMS)
- **Psychological** model of stress by **Lazarus and Folkman** - Suggests that stress is highly subjective and is a product of an individual’s appraisal of a stressor - **Stress = encounter (‘transaction’) + stress response** - Encounter – between a person & their environment - Stress response – based on the person's evaluation of the stressor and their ability to cope with it
39
Primary appraisal
- **Evaluation of the situation's importance** - Does it matter? Is it important? - Results in a decision about whether the event is: - **Irrelevant** – does not matter/apply to me - **Benign-positive** – neutral/not stressful - **Stressful** – harmful, threatening or challenging
40
Types of stress appraisals in primary appraisal
- **Harm** – how much damage has already occurred - E.g. ‘I have lost my job’ - **Threat** – harm that has not occurred but could occur in the future - E.g. ‘I might not be able to afford the rent’ - **Challenge** – potential for personal gain or growth from the situation (most positive form of stress) - E.g. ‘I’ll find another job and learn to budget my money’
41
Secondary appraisal
- Involves the **evaluation of available mechanisms and resources to cope with a situation** - Adequate coping resources = little / no stress - Inadequate resources = stress - Coping options can be: - Internal – strength and determination - External – support from family or friends
42
Strengths and limitations of the TMS
- **Strengths** - Emphasises subjective nature of stress response - Explains why people respond to stressors differently - Developed with reference to observations of people - **Limitations** - 1 & 2 appraisal can interact & occur simultaneously - Difficult to test through experimental research due to variability of individual stress responses - Stress can be experienced without thinking about the situation (appraisal is not essential)
43
Role of appraisal in the TMS
- Whether a person experiences stress depends upon the individual’s evaluation of the particular event - Situation only leads to stress if it is interpreted as –ve
44
Coping
- **Attempting to manage stressor** in some effective way - Involves cognitive & behavioural efforts to manage stressors that are appraised as exceeding one's resources
45
Coping strategies
- **Methods used to manage stress due to stressor** - May involve an action(s) or a thought process - Divided into approach and avoidance coping
46
Context-specific effectiveness | In relation to coping strategies
- When a coping strategy **matches or is a 'good fit'** to the stressful situation - E.g. an effective coping stategy when stressed about an exam would be planning and studying, whereas ‘wishful thinking,’ whilst engaging in minimal study is likely to be detrimental
47
Factors that influence the effectiveness of a coping strategy
- Personality, knowledge, skills, interests and preferences - Access to social support from family, friends or community
48
Coping flexibility
- Ability to **effectively modify a coping strategy according to the specific demands of the stressor** - Selecting a coping strategy that suits the specific situation - Recognising when a coping strategy is ineffective - Discontinuing 👎🏻 coping strats / implementing alternatives
49
Individual coping flexibility
- Individuals with **high coping flexibility**: - More likely to adequately cope w positive outcomes - Able to adjust a coping strategy if found ineffective - Good fit between strategy and situation’s demands - Individuals with **low coping flexibility**: - Not very adaptable (less likely to adequately cope) - Rely on same coping strategies, even if ineffective - Use same strategies across diff stressful situations
50
Relationship between coping flexibility and context-specific effectiveness of coping
- ↑ cop flex **+vely influences** context-specific effectiveness - Makes achieving context-specific effectiveness more likely (can adapt their coping strat to meet demands of stressor)
51
Approach and avoidance coping
- **Approach** – coping with stress by **directly** confronting and dealing with the stressor and its effects - Creating a solution that minimises / eliminates issue - E.g. seeking advice, apologising, taking responsibility - **Avoidant** – evading and **indirectly** dealing with the stressor and its effects - No attempt to actively confront stressor & its causes - Ineffective in the long-term - E.g. denial, distancing, procrastination
52
Advantages and disadvantages of approach strategies
- **Advantages** - Direct management is beneficial in the long-term - Generally considered more adaptive and effective - **Disadvantages** - Requires more energy and focus, which may cause the individual to neglect other aspects of their life - Not suitable for every situation (e.g. when nothing practical can be done about the stressor)
53
When avoidance coping can be effective
- **If the stressor is beyond one's control** and nothing practical can be done to address it - Avoiding unnecessary exposure to the stressor can prevent unnecessary distress - E.g. ignoring or avoiding a pessimistic co-worker - **Dealing with stress in the short term** - More when coupled w / followed by approach cop - E.g. firstly distancing (avoidance) during an argument to calm intense emotions, then returning to situation to effectively communicate (approach)
54
Exercise as a coping strategy
- **Uses up cortisol**, helping the body return to homeostasis - Releases endorphins which reduces negative emotions - Reduces muscle tension from fight / flight - Focus on breathing / repetitive movement (calming effect) ## Footnote NOTE: Exercise is commonly an avoidant strategy. It can be an approach strategy IF the source of stress is the need to improve physical fitness (e.g. a low fitness level resulting in poor self-esteem and stress).