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

Diagnosis-scope of first aid, Diagnosis: 1.  Diagnosis of the casualty ...

Diagnosis: 1.  Diagnosis of the casualty involves considering the history, symptoms and signs. 2.  History is the information as to how the accident or illness occurred.

Help with DNA and SNP, Hello! I have some questions related to biotechnolog...

Hello! I have some questions related to biotechnology; study in DNA and SNPs. Any ideas for a way to cure schizophrenia, using the knowledge of SNPs? And can you tell me, if it is

Excretory function of bile, Excretory Function of Bile Excretory functi...

Excretory Function of Bile Excretory function: Bile pigments (bilirubin and biliverdin) are the waste products of the breakdown of red blood cells and bile is their route of ex

The earths iterior, Ask question how many years that our earth survived?#Mi...

Ask question how many years that our earth survived?#Minimum 100 words accepted#

Cell theory, Ask question #Minimumwhat is that definition for cell theory? ...

Ask question #Minimumwhat is that definition for cell theory? 100 words accepted#

What is hydrolysis, What is hydrolysis Fats when  boiled with  water  a...

What is hydrolysis Fats when  boiled with  water  at  220°C  under  pressure  in  an  autoclave,  undergo hydrolysis to first form a diglyceride and then ultimately glycerol an

Electricity, why do we get shock when we touch an open wire?

why do we get shock when we touch an open wire?

Define the nature of sound, Define the Nature of Sound This section is ...

Define the Nature of Sound This section is a recapitulation of what you have learnt in school. You would recall that sound waves consist of the longitudinal waves of alternate

Explain the malformations or birth defects of genital organs, Explain the M...

Explain the Malformations or Birth Defects of Genital Organs Other gynaecological morbidities cover congenital malformations or birth defects of the genital organs. These occur

Applications of laser, Applications of Laser: Due to its properties, ...

Applications of Laser: Due to its properties, laser light can be put to a number of uses in industry, medicine, communications etc. We will briefly describe  some of these us

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