physiological stress/

Topics: Epinephrine, Hypothalamus, Adrenal gland Pages: 4 (1137 words) Published: October 15, 2014
1SCENARIO 1 (500 words)
A patient who is waiting to be seen in a clinic is feeling stressed. In relation to physiological stress, explain why their heart rate is increasing. PLEASE TYPE YOUR ANSWER BELOW:
Any destruction or disturbance into a person’s mental and physical wellbeing is referred as stress. Stress can be considered as stimulus wherein a person reacts in a different way (Niven, N. 1994). In stressful circumstances, The body react if there are build ups in the production of hormones like adrenalin and cortisol that yields an alteration of heart rate and metabolism to make better performance (Peters, M. 2006).

Stress reaction is triggered when there is an activation of stressor in the hypothalamus. In this essay the stressor identified is the patient waiting to be seen in a clinic feeling stressed. When patient perceive that they are in frightening or uneasy situation and that they do not have the capacity to deal successfully, the neurons carry the messages to the cerebral cortex which is the area of the brain where thinking process comes, to determine the trouble. The messages sent through the amygdala which identifies the probable outcome of the trouble (Lightman, S. 2008). Amygdala is a part of the limbic system or called key emotional centre of the brain (Tortora and Derrickson 2009), It is also called the nuclei of the hypothalamus which is the critical part of the brain that coordinate an activities in response of stress. The amygdala triggers hypothalamus to bring messages through sympathetic centers in the spinal cord which then get to the middle of the adrenal gland called adrenal medulla, and release hormone 2

called adrenalin (epinephrine) and norepinephrine (also known as noradrenaline) (Lightman, S. 2008). Adrenaline and noradrenalin are chemicals that released into the blood stream by nerve endings of the sympathetic nervous system (part of autonomic nervous system) in response to physical or mental stress, it is very significant...

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