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

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

Coping stress, Ask question #Minimum 100 words acceptedYou are caring for a...

Ask question #Minimum 100 words acceptedYou are caring for a 29-year-old woman who is married with two small children, ages 1 and 3 years, at home. She is recuperating from a left

State the acid solution weathering, Acid solution weathering Weatherin...

Acid solution weathering Weathering is accelerated by the presence of the hydrogen ions in water.  Rain water dissolves CO 2 from air to form carbonic acid, H 2 CO 3 . When t

Explain the structure of tongue, Explain the Structure of Tongue The to...

Explain the Structure of Tongue The tongue is a muscular organ. It is covered with a mucous membrane. The tongue is attached by its base to the hyoid bone and by a fold of its

State about the oxidised forms of elements, State about the Oxidised forms ...

State about the Oxidised forms of elements Oxidised forms of elements are more desirable for most common crops grown in acid soils and humid regions while the reduced forms of

Define albumin in the urine, Define Albumin in the Urine Albumin in the...

Define Albumin in the Urine Albumin in the urine generally means leaking of the plasma albumin through the inflamed renal glomerulus (glomerulonephritis). It may also be presen

Define benefits and constraints of multicellular organisms, Define Benefits...

Define Benefits and Constraints of Multicellular Organisms Some of the benefits and constraints of multicellular organisms are as follows: 1) There is a unique co-ordination

How To Get Back The Super Qualities Of The Brain, Hey There,I Have a Very I...

Hey There,I Have a Very Important Question,A Friend of Mine Watched the Movie The Secret About One Year Ago...And Something Happened To Him,As He Always Knew His Purpouse and Was V

Hej, # Fråga ..

# Fråga ..

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