Autonomic system, Science

Assignment Help:

Autonomic System:

The autonomic nervous system gets its name from the fact that it relates to autonomous*or self-regulatory activities such as digestion and circulation, which continue even when we are asleep or unconscious. Impulses from the brain and spinal cord travelling along the autonomic nerves, cause blood vessels to dilatwr contract, digestion to slow or speed up, body  temperature to rise or fall, all according to the changing requirements.

The autonomic system consists of  two sets of nerves: The sympathetic nerves which stimulate the body  to react in a situation of stress or danger by  increasing the blood pressure, heart beat rate, breathing and flow of blood to the muscles, and by decreasing  the flow of blood to the digestive organs and kidneys. All these reactions are a preparation for a sudden expenditure  of energy in either fighting or fleeing. The parasympathetic nerves which prepare the body  for relaxed functions.

The autonomic nervous system does, however, interact with conscious nervous activity. For example, it is well known that anxiety and mental tension can affect digestion,  they tven cause peptic ulcers or high blood pressure. A child's dislike for school may make him sick every morning, without his being conscious of  the connection. Under certain conditions, with  lot of practice, some people have found it possible to consciously control heart beat, or blood pressure, or body  temperature or breathing rate and oxygen intake; others may regulate the feeling of pain or even correct malfunction of an organ. But these are extraordinary  and excepticnal abilities  ckveloped with tremendous expenditure of time and effort.  


Related Discussions:- Autonomic system

Electrodes, working of calomel electrode

working of calomel electrode

Define the frontal area or pole of the cerebrum, Define the frontal area or...

Define the frontal area or pole of the Cerebrum The frontal area or pole, as shown in the Figure, extends anteriorly from the pre motor area to include the remainder of the fro

Explain inspiratory capacity and expiratory reserve volume, Explain Inspira...

Explain Inspiratory Capacity and Expiratory Reserve Volume Inspiratory Capacity (IC):  It is the tidal volume and the volume of air taken during maximum inspiratory effort.

Explain types of steroids, Steroids are of many types . These are given be...

Steroids are of many types . These are given below: a)  Sterols :  Cholesterol, ergosterol. b)  Bile acids :  Glycocholic acid, taurocholic acid. c)  Hormones  :  Testoste

What is synthesis of specialized products from amino acids, What is Synthes...

What is Synthesis of Specialized Products from Amino Acids In addition to serving as building blocks for proteins, amino acids are precursors of many nitrogen containing compou

Giraffes, does giraffes have short necks?

does giraffes have short necks?

Pollution, Pollution Now-a-days, you might have heard every one talking...

Pollution Now-a-days, you might have heard every one talking about pollution. What does pollution mean? Pollution is the addition to the environment (air, water, soil) of subst

Month day, why there is 28 day in february month

why there is 28 day in february month

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd