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

Explain the serum creatinine test, Explain the Serum Creatinine Test Cr...

Explain the Serum Creatinine Test Creatinine is a breakdown product of creatine, an important component of muscle. A serum creatinine test measures the amount of creatinine in

Soil science, what is biological sickness of soil and give mangement measur...

what is biological sickness of soil and give mangement measures?

Natural resources, Natural resources: Resources, or the wealth nature h...

Natural resources: Resources, or the wealth nature has bestowed on us are essential for civilised living, and therefore, they have to be wisely used. However, it is believed th

Chemicals in medicines., I want conclusion for the above topic. please help...

I want conclusion for the above topic. please help me out.

Derive an expression for the natural frequency - beam mass, The simply-supp...

The simply-supported uniform beam shown in the ?gure below supports a mass m at a distance aL from the left support. Assume that the beam is relatively mass-less compared to the ma

In how many groups proteins may be classified, Proteins  may  be  classi...

Proteins  may  be  classified  broadly  into three  groups: a) Simple proteins, b) Conjugated proteins, and c) Derived proteins.

Keep concentrations of ions constant - Function of Kidney, Keep the Concent...

Keep the Concentrations of Ions Constant Keep the concentrations of various ions and other important substances constant. A number of chemicals are important to the blood chemi

Why do we require vitamins?, To perform the specific biological func. for t...

To perform the specific biological func. for the normal maintenance of optium growthand health.

Explain pantothenic acid (vitamin b5), Pantothenic acid (vitamin B5) P...

Pantothenic acid (vitamin B5) Pantothenic acid, also  known  as vitamin B5, is essential to  all forms of  life. Pure pantothenic acid was  first isolated as its calcium salt

Determine about the plant-available soil moisture, Determine about the Plan...

Determine about the Plant-Available Soil Moisture  Plant available soil moisture or total available water is the difference between the amount of water held in the plants root

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