The Nervous System

The Autonomic Nervous syetem (ANS) controls involuntary bobily functions, for example the criterioning heart. The involuntary offensive syetem is coposed of the numerous nerves which projects from the brain and the spinal electric cord to the smoothmuscles of various babily organs.There are two major parts to the involuntary syetem which a good deal works in oppsition to apiece some other, just non al bearings. One is the gentle governing body. The sympathetic nervous transcription is often called the fight-flight response system. This system adjoins heart rate and bloood twinge, and distri entirelyes beginning to outside muscles.This system capture worked up when arousal level increases. The other part, the parasympathetic system reduces heart rate and credit line pressure and diverts beginning to the digestive tract. This system is active when arousal or emotional level low. It is ultimately responsible for the build up and conservation of bodily stores of e nergy. 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 body 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 handle to the muscles through the circulatory system. This occurs because nervous impulses to the heart caus it to beat harder and faster, therefore increasing blood pressure and pulse rate. Sveral other involuntary transfigures 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 in like manner dischages two hormones, adrenalin and noradernalin. These are secrerted by the adrenal glands located... This movement is very well written. A few minor errors, but I am able to follow it all the focus through. Lacks an appropriate introduction and conclusion but maybe you were not asked to do a formal essay. Thanks again:) If you insufficiency to get a full essay, order it on our website: BestEssayCheap.com

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