As the semester comes to an end, college students around the nation are fervently studying for their comprehensive final exams--the test that determines whether their culmination of sweat, tears, and long hours of studying throughout the semester were sufficient to get the desired grade. This short yet intensive period, known as final exam week, deservingly brings to thought one of Thomas Paine's famous quotes--"These are the times that try men's souls"--to emphasize the amount of stress students undergo this week. Many students will often pull "all-nighters" with the combination of caffeine, energy drinks, and even medicinal drugs to cram and study as much information as possible before the exam. The desire to do well academically takes control …show more content…
In 1973, Hans Selye, an endocrinologist, defined stress as "a non-specific response of the body to any demand made upon it". This clear and precise definition does not necessarily describe stress as a negative aspect of life, and leaves room for some interpretation. In essence, stress is any factor that causes a homeostatic imbalance, and the body's stress response seeks to return it to homeostasis. Stress is necessary as we always put demands on our body. It is a crucial part that defines our lives--if one were to live without stress, one would practically be living a monotonous life under a rock. Stress is omnipresent in our society; it is only in the presence of too much stress does it become detrimental in our …show more content…
Hans Selye described the overall variety of effects that spawn from stress--the "increased heart rate, breathing rate, and adrenal secretions"--as the general adaptation system (GAS) (Kalat). He characterized this system with three responses: the alarm reaction, the stage of resistance, and the stage of exhaustion. At the onset of the alarm stage, epinephrine and cortisol are secreted by the adrenal medulla into the blood stream. Cortisol has many functions, one of which is to facilitate metabolic pathways and increase blood sugar levels. Metabolic pathways such as glycolysis and gluconeogenesis become activated in skeletal muscles and cardiac muscles to increase breathing and muscular movement and efficiency. The sympathetic nervous system is activated, giving the individual the fight-or-flight response. There are seven characteristics in the alarm phase: (1) increased alertness, (2) increased energy consumption, (3) increased mobilization of energy resources such as glycogen and adipose tissue, (4) circulatory changes in blood flow, (5) severe reduction in digestion and urine production, (6) increased secretion of sweat, (7) increased respiratory rate, heart rate, and blood pressure. Catecholamines secreted such as epinephrine and cortisol goes into the blood stream and can target G-protein coupled receptors (GPCRs) that will then
In Prospero 's case in Masque of the Red Death Prince Prospero, was faced with the threat of survival, surviving the Red Death, a plague sweeping his kingdom killing all it comes into contact with. To produce the fight-or-flight response, the hypothalamus activates two systems: the sympathetic nervous system and the adrenal-cortical system. The sympathetic nervous system uses nerve pathways to initiate reactions in the body, and the adrenal-cortical system uses the bloodstream. The combined effects of these two systems are the fight-or-flight response.When the hypothalamus tells the sympathetic nervous system to kick into gear, the overall effect is that the body speeds up, tenses up and becomes generally very alert. If there 's a burglar at the door, you 're going to have to take action fast. The sympathetic nervous system sends out impulses to glands and smooth muscles and tells the adrenal medulla to release epinephrine and norepinephrine into the bloodstream. These "stress hormones" cause several changes in the body, including an increase in heart rate and blood pressure.At the same time, the hypothalamus releases corticotropin-releasing factor into the pituitary gland, activating the adrenal-cortical system. The pituitary gland secretes the hormone ACTH (adrenocorticotropic hormone). ACTH moves through the bloodstream and ultimately arrives at the adrenal cortex, where it activates the release of approximately thirty different
Chapter 6 covers the fundamentals of stress disorders. After reading this chapter discussing the fight and flight response, psychological stress disorders and physical stress disorders, I have a better concept of this subject itself. Our fight and flight response is trigger by our hypothalamus, which sends off neurons and chemical for our mind and bodies to react. As discussed in class, the autonomic nervous system control the involuntary activities like heartbeat and breathing. The sympathetic nervous system is aroused when we face danger (THE FIGHT). For example, the sympathetic nervous system makes our heart beat faster when we are scared. The parasympathetic nervous system (THE FLIGHT) help make us calm, like regulating our heartbeats.
The stress response involved the HPA-hypothalamic-pituitary-adrenal axis. First, the hypothalamus activates the sympathetic nervous system. The adrenal gland then secretes epinephrine and norepinephrine, which increase heart rate. The pituitary gland produces hormones that tell the adrenal gland to secrete cortisol, which is involved with the release of stored energy. The negative feedback loop comes into effect when the hypothalamus detects that the cortisol has reached a certain concentration, thus returning the body to homeostasis.
glucoprivation, and of manifestations of emotional distress. In contrast with the view that the sympathetic nervous and adrenomedullary hormonal systems function as a unit (the ‘sympathoadrenal system’) to maintain homeostasis in emergencies, across a variety of situations adrenaline responses are more closely linked to responses of the hypothalamic‐pituitary‐adrenocortical system than of the sympathetic nervous system. The sympathetic noradrenergic system is active even when the individual is at rest and maintains tonic levels of cardiovascular performance. Adrenoceptors in the membranes of effector cells determine the physiological and metabolic effects of catecholamines. Noradrenaline and adrenaline are catecholamines. Noradrenaline is the
There are three different theories that are used when talking about how we react to stress through the physiological aspect or the psychological aspect. The first is part of the physiological aspect of stress called the Cannon Fight or Flight theory which was proposed in 1914. Fight or Flight response is a physiological stress response that evolved to help organisms to survive immediate danger. The theory states that when an organism, human being or animal, faces imminent danger (acute stressor) the body arouses quickly and is ready to act via two different systems. They are the sympathetic nervous system and the endocrine system. The sympathetic nervous system stimulates the adrenal medulla which is part of the endocrine system and is the region that produces the hormones such as adrenaline and noradrenaline. These hormones increase heart rate, blood flow, and glucose levels to prepare the body for an emergency. This response from the body suggests that the body knows how to protect itself and reach homeostasis. These two systems work together to either fight against the danger or flight away from the danger. Lord, King and Pfister in 1976 studied the Fight or Flight response in animals through a very unethical study. They administered chemicals on male hooded Wistar rats which inhibited the neurotransmitters from functioning normally. This made it very difficult for the rats to escape an electric shock. The results of the study suggest that the Flight or Fight response
The first stage is the alarm stage. This is the body first reaction to stress. During this stage the body undergoes fight or flight reaction. An example of this stage would be driving a car and the car in front of you slams on their brakes, you slam on your brakes and your heart is beating faster because of the close call. The second stage of GAS is the resistant stage. During this stage after a long period of stress the body makes an effort to restore its energy
General Adaptation Syndrome, or GAS, is a term Selye used to describe the human body’s short-term and long-term reaction to stress. Stressors in humans include emotional or mental stressors such as the loss of a loved one, inability to create solutions or even having a difficult day at work. Humans also experience physical stressors such as getting hit by a car or starvation. Hans Selye was the first person to describe the General Adaptation Syndrome in the British Medical Journal in 1936. Selye labeled it General because it is produced only by stressors which have a general effect on a large portion of the body, Adaptive because it stimulates defense and Syndrome because its individual manifestation are coordinated and dependent on each other. There is an inherent characteristic of stress, which helps to lead to the General Adaptation Syndrome. In the biological sense, stress is the interaction between a damage and defense. Every stressor produces certain types of action different from their stressor effects. Thus, the General Adaptation Syndrome rarely occurs in pure, unadulterated form, but is always complicated by various specific actions from the different eliciting
When the sympathetic nervous system is engaged, your body releases epinephrine and norepinephrine that cause the effects that are seen during stress. When epinephrine and norepinephrine are released the following effects are seen: increase in heart rate, hyperglycemia, the airway widens, pupils dilate, the gastrointestinal system is slowed down,
The term stress comes from the field of physics by one of the fathers of stress research Hans Selye in 1936. He insisted that stress was a non-specific strain on the body caused by irregularities in normal body functions (”History of stress”). Stress is one of bodily or mental tension resulting from factors that tend to alter an existent equilibrium (”Definition of stress”). There's three
When the sense organs (of hearing or sight) receive the “alarm signal” they instantly pass it to the brain. Then the brain sends messages to the muscles and organs and therefore, muscles contract, often very abruptly. If the state of alertness is prolonged, muscle activity and tension remain high in order to prepare the body of reacting quickly to any subsequent stimuli. In a fight or flight situation, heart rate changes. Furthermore, there are a series of chain reactions. The first thing that happens is that the heart starts to beat faster in order to pump a copious supply of blood to the essential
The three stages are alarm, resistance, and exhaustion. Two systems that directly regulate and mange stress are called the endocrine system and the norepinephrine system. The endocrine system secretes hormones called, cortisol
The stress responses is behavioral and physiological response that include the body’s arousal and attempt to reduce stress. The purpose of the stress response is to respond to the body’s perception of a stressor stimulus in attempt to reduce it or help the individual deal with the perceived threat (Kolb, Whishaw, & Teskey, 2016, p. 204). The body’s perception of stress is usually through sensory information and input along with experiences. Hormones play a significant role in the stress response leading the individual to have some type of a physiological response such as increase in heart rate, increase in breathing, liver release of glucose for energy, When the body determines a stimulus as a stressor the hypothalamus initiates stress response and triggers the pituitary gland, and the adrenal medulla to release the hormone epinephrine (McLeod, 2010).
Hans Selye (1982) points out that few people define the concept of stress in the same way or even bother to attempt a clear-cut definition. According to Selye, an important aspect of stress is that a wide variety of dissimilar situations are capable of producing the stress response such as fatigue, effort, pain, fear, and even success. This has led to several definitions of stress, each of which highlights different aspects of stress. One of the most comprehensive models of stress is the Biopsychosocial Model of Stress (Bernard & Krupat, 1994). According to the Biopsychosocial Model of Stress, stress involves three components: an external component, an internal component, and the interaction between the external and internal components.
So what is stress? Stress is a normal physical response that happens when you feel threatened or upset. When you feel that you are in danger whether it is real or imaged. Your body has a response when stress occurs and it is a way of actually protecting you. Many times, stress helps people stay more focussed and energetic.
Stress is an ongoing dilemma that occurs in each and everyone’s life. It is a factor that is undoubtedly a part of daily living. Due to the trivial problems that occur in people’s daily lives massive amounts of stress can arise. People perceive and manage stress in many different ways. The causes and effects of stress are numerous and one’s ability to manage stress is vital in maintaining healthy living.