Ch. 16 - Health & Stress Flashcards
Stress can have positive effects on our functioning and enhance our ability to thrive.
a
True
b
False
a
True
Stress is adaptive and helped your ancestors survive and thrive. Prolonged stress, on the other hand, is harmful.
(Whereas good stress is beneficial for us, motivating us to work to achieve our goals and even enhancing our functioning, bad stress can reduce motivation and impair functioning.)
Define the terms Eustress vs Distress
Even Hans Selye (Figure 16.2), one of the pioneers of stress research, emphasized the upside of stress in our lives (Selye, 1980). He coined the term eustress to represent reactions to good stress and contrasted it with the word distress, which represents reactions to bad stress.
Eustress usually occurs in the context of experiences such as getting married, having or adopting a child, getting a promotion at work, or being confronted with manageable challenges in everyday life
Yerkes-Dodson law?
outlines an inverted U-shaped curve for the relationship between stress and performance (Yerkes & Dodson, 1908).
***This law specifies that too little or too much stress impairs performance.
Maximal Adaptability Model?
One updated model of stress and performance is the Maximal Adaptability Model, which emphasizes that humans and other organisms are actually highly adaptive to stressors and can maintain high levels of performance even when experiencing underload or overload in terms of the demands of the environment.
Example: Although the COVID-19 pandemic led to widespread exposure to major psychological stressors, people showed remarkable resilience, at least during the first year
Define Stressors
Stressors are external circumstances and stimuli that are perceived as having the potential to disturb an individual’s balanced state.
Stressors can range from mild to severe.
Define Stress responses
Stress responses are internal integrated psychological and biological responses to stressors that work to restore a balanced state.
So, Stressor is the thing causing the stress, and Stress response is how we respond to that stress.
. Acute stressors vs Chronic stressors vs traumatic stressors
Acute stressors are short-term external circumstances or stimuli, lasting minutes to hours, with the potential to disturb an individual’s balanced state. Some examples are giving a 15-minute speech in public, or taking an important exam.
Chronic stressors are enduring external circumstances or stimuli, lasting weeks to years, with the potential to disturb an individual’s balanced state. Living in poverty, caring for an elderly relative, experiencing racism and discrimination in daily life.
Traumatic stressors are the most severe stressors, those involving a threat to your own or another’s life or physical integrity.
Stressors produce what type of changes in us?
a
Cognitive
b
Emotional
c
Physiological
d
All of the above
d
All of the above
Toward the beginning of the section on stressors and stress response, we discussed how stress responses are internal and can involve negative thoughts or cognition, negative emotions such as fear and anxiety, and physiological changes such as increased blood pressure and sweaty palms.
What is the Amygdala?
The amygdala is a small, almond-shaped cluster of nuclei located deep within the temporal lobes of the brain, part of the limbic system.
The amygdala is sometimes called the “neural watchdog,” because it responds to potential stressors rapidly and sometimes even before conscious awareness.
The amygdala doesn’t act alone, but instead works in a coordinated way with other brain areas that can either increase or decrease the amygdala’s response.
What is the hippocampus?
The hippocampus is located within the medial temporal lobe, roles in the processing of information from short-term memory to long-term memory and in spatial memory that enables navigation.
–>When we are in a stressful situation, it helps us to form a new memory of the stressful situation we’re in, as well as seach for existing memories on how to protect or save the body from the stressor or danger.
This is what Patient HM (Henry Molaison) had removed.
What is the Prefrontal cortex?
The prefrontal cortex (PFC) is a region at the front of the brain, located in the frontal lobes, directly behind the forehead.
One of the last parts of brain to mature, and involved in decision making.
–>It may see something as a threat, and it will send it to the amygdala. Also, if the amygdala is overreacting, or makes a mistake, the prefrontal cortex will step in and tell it to calm down.
–>monitors hippocampus as well.
Which of the following statements is true concerning the brain regions that are involved in response to stress?
a
While the hippocampus is the region of the brain that responds rapidly to stress, the prefrontal cortex evaluates the stressor and then determines what action to take.
b
While the amygdala is the region of the brain that responds rapidly to stress, the hippocampus evaluates the stressor and then determines what action to take.
c
While the amygdala is the region of the brain that responds rapidly to stress, the prefrontal cortex evaluates the stressor and then determines what action to take.
d
While the prefrontal cortex is the region of the brain that responds rapidly to stress, the amygdala evaluates the stressor and then determines what action to take.
c
While the amygdala is the region of the brain that responds rapidly to stress, the prefrontal cortex evaluates the stressor and then determines what action to take.
According to the Neurobiological Responses to Stressors section, stressors first activate the amygdala, the hippocampus allows us to compare new memories of the current stressors to old memories of similar stressors, and the prefrontal cortex can evaluate the higher-level stimuli related to the stressors to mitigate or intensify the amygdala’s response.
{amygdala is called the “neural watchdog” because of its fast response to stimuli.}
The two branches of the autonomic nervous system?
- The Sympathetic Nervous System.
- The Parasympathetic NS.
The parasympathetic nervous system can ______ the fight-or-flight response and allow for the restoration of ____________.
The parasympathetic nervous system can dampen the fight-or-flight response and allow for the restoration of homeostasis.
Activation of the sympathetic nervous system promotes the release of stress hormones called __________ from the adrenal glands, which are located at the top of each of the kidneys.
Catecholamines.
These catecholamines include epinephrine and norepinephrine, which play a crucial role in preparing the body for the fight-or-flight response
Stressors can also activate the ___ axis, which creates a cascade of activities that ultimately promote the release of the stress hormone cortisol from the adrenal glands. First, the _____________ sends signals to the __________________ (which is central to both ANS and HPA responses to stressors) to release __________________________________________ (CRH). Second, CRH signals a gland located close to the hypothalamus called the __________________ to release ___________________________ (ACTH). Finally, ACTH travels in the bloodstream to the _________________, where it promotes the release of _________.
Stressors can also activate the HPA axis, which creates a cascade of activities that ultimately promote the release of the stress hormone cortisol from the adrenal glands. First, the amygdala sends signals to the hypothalamus (which is central to both ANS and HPA responses to stressors) to release corticotropin-releasing hormone (CRH). Second, CRH signals a gland located close to the hypothalamus called the pituitary gland to release adrenocorticotropic hormone (ACTH). Finally, ACTH travels in the bloodstream to the adrenal glands, where it promotes the release of cortisol.
The fight-or-flight response involves an outpouring of which of the following into the bloodstream?
a
Estrogen and progesterone
b
Acetylcholine and endorphins
c
Lymphocytes and glutamate
d
Epinephrine and cortisol
d
Epinephrine and cortisol
Epinephrine and norepinephrine are stress hormones released by the adrenal glands in the kidneys, which is part of the sympathetic nervous system. Cortisol is another stress hormone released by the adrenal glands as part of the hypothalamic pituitary adrenal axis.
–>Is SAM axis the one triggered by sympathetic nervous system?
What is the difference in the way cortisol levels are throughout the day in a person experiencing chronic stress versus a person who isn’t?
In humans, cortisol typically increases rapidly after awakening and then declines throughout the day until evening and bedtime. People experiencing chronic stressors tend to show a flattening of this response, such that there are lower levels of decline throughout the day.
What does cortisol do?
Cortisol, known as the “stress hormone,” plays a role in various body functions, including the regulation of metabolism, immune response, and stress response. It follows a diurnal pattern, meaning its levels vary throughout the day.
Freeze response?
This response often occurs in prey animals when they are completely overcome by a predator. Instead of continuing efforts to fight or flee, these animals become immobile and outwardly unresponsive. Accumulating evidence suggests that humans also engage in freeze responses to stressors, particularly to stressors that are traumatic and uncontrollable (Schmidt et al., 2008).
Define Reciprocal Inhibition in the context of the two branches of the autonomic nervous system.
The two branches of the autonomic nervous system are the Parasympathetic nervous system, and the Sympathetic nervous system.
Reciprocal inhibition just refers to the fact that they’re basically complementary to each other. So “Rest & digest” functions vs “fight or flight” functions.
Within the HPA axis, there are ________ feedback loops that serve as regulators.
Within the HPA axis, there are negative feedback loops that serve as regulators.
–>Negative feedback loops are when we have a set optimal condition for the body’s homeostasis (ex: temperature), and when we deviate from that, negative feedback loops are used to OPPOSE the change and bring the animal back to a set point.
{In this case, we want to return to normal cortisol levels).
->And positive feed back is when we want to accentuate the change (ex: heaving gets worse until you throw up).
Activation of the sympathetic nervous system (SNS) leads to the release of _______________ , while activation of the hypothalamic pituitary adrenal (HPA) axis leads to the release of
_________.
Activation of the sympathetic nervous system (SNS) leads to the release of _catecholamines _ (Epinephrine and Norepinephrine), while activation of the hypothalamic pituitary adrenal (HPA) axis leads to the release of
Cortisol.
(Epinephrine and norepinephrine are catecholamines, which are released by the adrenal glands to activate the autonomic nervous system, and cortisol is the most popular biological marker of the stress response released by the hypothalamic pituitary adrenal axis.)
True or False:
Research has revealed that even everyday acute stressors can activate the inflammatory response of the immune system.
True.