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

Ecology and environment, Ecology and environment: Today, we hear people...

Ecology and environment: Today, we hear people from different walks of  life, using the terms ecology and environment. Politicians,  leaders. town planners, students and archit

What a molecule difference between molecules and compounds, What a molecule...

What a molecule is, and the difference between molecules and compounds? A molecule is made up of two or more atoms combined chemically. The atoms can be of the same element, as

How temperature of the earths layers is changed, How Temperature of the Ear...

How Temperature of the Earth's Layers is changed? How does the temperature of the Earth's interior change as one goes deeper within the Earth? As one might expect, the farther

Explain the anti-diuretic hormone (adh), Explain the Anti-Diuretic Hormone ...

Explain the Anti-Diuretic Hormone (ADH) It is secreted by the pituitary gland and controls the ability of water to pass through the cells in the walls of the collecting ducts.

Explain General Appearance of Urine, General appearance - General Examinati...

General appearance - General Examination of Urine Dilute urine is usually pale and straw-colored while the concentrated urine is dark and acid urine is darker. Blood may cause

Science project, i dont know how to set up my science board

i dont know how to set up my science board

To study the relation between volume and pressure of air, To study the rela...

To study the relation between volume and pressure of air Get  a rubber bung or 'door stop' which just fits in a narrow glass jar or measuring cylinder. Attach it  to  the  lowe

Clothing materials, clothing materials and their respective qualities

clothing materials and their respective qualities

Humanbody, how i can get the nams of all the body of the human

how i can get the nams of all the body of the human

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