The Nervous System

The Autonomic Nervous syetem (ANS) controls involuntary bobily functions, for example the criterioning heart. The involuntary tense syetem is coposed of the numerous nerves which projects from the brain and the spinal electric heap to the smoothmuscles of various babily organs.There are two major parts to the involuntary syetem which a good deal works in oppsition to each some other, just non al bearings. One is the pitying administration. The sympathetic nervous system is often called the fight-flight response system. This system developments heart rate and bloood twinge, and distri notwithstandinges beginning to outside muscles.This system commence randy when arousal level increases. The other part, the parasympathetic system reduces heart rate and credit line pressure and diverts cable to the digestive tract. This system is active when arousal or emotional level low. It is ultimately responsible for the build up and saving of bodily stores of energy. When the sympathetic system become activated as a result of an increase in atousal level, severl physioloical symptoms result. First, blood vessels in the stomach, intestines and iterior of the body tend to contract while those of the out-of-door muscles of the torso and limbs tend to expand. As a result, blood is shifted from digestive functions to musclar functions in order to facilitate greater musclar activity. Second, more blood is pump to the muscles through the circulatory system. This occurs because nervous impulses to the heart caus it to beat harder and faster, gum olibanum increasing blood pressure and pulse rate. Sveral other autonomic reassigns occer during a heightended arosal start.

Fear, for example is characterised by such changes as increase a pupil size, drying of the mouth, and the stopping or policy change of stomach and intestinal contractions. During an aroused start, the sympathetic system to a fault dischages two hormones, adrenalin and noradernalin. These are secrerted by the adrenal glands located... This drive is very well written. A few minor errors, but I am able to follow it all the port through. Lacks an appropriate introduction and conclusion but maybe you were not asked to do a formal essay. Thanks again:) If you deficiency to get a full essay, order it on our website: BestEssayCheap.com

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