Sympathetic Nervous System Essay

20.The part of the ANS that is responsible for reacting to stressful events and bodily arousal is called the  sympathetic division of the nervous system.

stomach, liver, eyes and gall bladder. The ANS is also separated into two other parts the sympathetic nervous system (SNS) and the parasympathetic nervous system (PSN). The SNS will be activated when an individual is stressed; it prepares the body for action. During this stage the body decided with it want to fight or flee the situation. This procedure is known as the fight or flight response. The PSN works to maintain the day-to-day functions e.g breathing, digestion and the heart rate. It also brings the body back to its normal state after the SNS is

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

Alpha- adrenergic are receptors that generally stimulate the sympathetic nervous system. The sympathetic nervous system is responsible for flight or flight response, which includes, mobilizing energy, dilating the pupils, diverting blood flow from organs to the skeletal muscle, and increasing the heart rate. The alpha-adrenergic receptor make the heart beat faster causing the blood vessels to constrict. This combination can lead to high blood pressure. The more stress we intake, the more our bodies go into this risky

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

The aim of this study is to investigate the relationship between various psychological responses (mood, emotion and coping) and the sympathetic nervous system response to an acute stress challenge. This will help understand the underlying mechanisms in the stress-ill-health relationship and will increase the knowledge about how psychological aspects may reduce physiological responses. Therefore, the collected knowledge will help form future interventions.

The nervous system is activated, releasing hormones that prepare the body to take off or fight. This is called the "fight or flight" response. Your body’s heartbeat speeds up, your rate of breathing increases, muscles are tense, and you start to sweat. This is short-term and temporary (acute stress), and usually your body recovers quickly. Long term stress, when stress stays activated for ‘n long period (chronic stress), can lead to serious health problems. The constant rush of stress hormones will wear your body down, causing it to age quicker and be more prone to illnesses. When stress is not properly addressed it can lead to serious health

Under conditions of stress, the nervous system, via the SAM (sympathetic-adrenal-medullary) and HPA (hypothalamic-anterior pituitary-adrenal cortex) systems, produces neurotransmitters and hormones (such as cortisol and catecholamines) that bind to receptors on immune system cells;

Once your brain has decided there’s a danger, in stressful situations, it sends immediate nerve signals down your spinal cord to the pituitary gland and all the ways to the kidneys where your adrenal gland resides, which is how adrenaline is released. Once released, adrenaline increases the amount of sugar in your blood, increases your heart rate and raises your blood pressure. The brain’s hypothalamus also sends signals to your pituitary gland, which allows the body to release Cortisol: Cortisol is a stress response that allows the blood and sugar pressure to remain high, which helps when escaping from danger. For instance, in an interview, which presents a challenge, simulated the same biological reaction that a threat to your life does.

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.

Sympathetic Nervous System: Mobilizes bodily resources to respond to the stressor. Emergency response is often called fright or flight response.

Nervous system stimulants can be very addictive and must be used with caution; misuse may lead to more severe cardiac and neurological effects. Symptoms include: agitation, paranoia, hyperthermia, and muscle breakdown. These symptoms are similar to neuroleptic malignant syndrome. This is a severe disorder that is caused by adverse reactions of medications with a rapid withdrawal of dopaminergic

Acute stress causes the arousal of the autonomic nervous system (ANS). The ANS comprises of the sympathetic nervous system (SNS) which prepares the individual for ‘fight or flight’ and the parasympathetic branch, which returns the individual to their original state of relaxation. Part of the SNS response is the sympathetic adrenal system (SAM), this system along with the SNS is collectively called the sympathomedullary pathway. The SNS is activated when the neurotransmitter noradrenaline is released and travels to the organs of the body preparing them for rapid action. Common responses to this would be increased heart rate, increased pupil size and metabolic changes such as a release of

Stress affects the body in many different ways. Many doctors estimate that stress is involved in more than half of all illnesses (Sapolsky, 21). Stress may cause or prolong an illness or increase its severity. Epinephrine and norepinephrine are hormones that are released during a stress reaction that affect organs throughout the body. As a result from the hormones being secreted, the heart begins to beat more rapidly, muscle tension increases, blood pressure raises, and heavy breathing may occur. This reaction is known as the fight-or-flight response. The fight-or-flight response energizes the body to either confront or flee from a threat. Heredity, learning, and injuries all play a role in determining where or when a stress related illness may occur in a particular individual (Sapolsky, 22).

     The Parasympathetic nervous system is an antagonist to the sympathetic nervous system. Its primary function is to give you the ability to rest and relax, in times when you are tired or stressed. The parasympathetic nervous system works to save energy and allow your blood pressure to also decrease. Your heartbeat reduces becoming much slower, and digestion can start. Notice again in figure