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

Define the visual area of the cerebrum, Define the visual area of the Cereb...

Define the visual area of the Cerebrum The visual area lies behind the parieto-occipital sulcus and includes greater part of occipital lobes. Optic nerve passes from eyes to th

Discuss problem oriented medical records, Question 1. Discuss Problem O...

Question 1. Discuss Problem Oriented Medical Records. 2. What is meant by colour coding? Explain the different types of colour coding. 3. What is a "Code Set"? Explain th

Biological evolution, Biological evolution We can presume that biologic...

Biological evolution We can presume that biological evolution began with the formation  of  the first true cells. These must have been  forms that did not require free  oxygen

Explain immune system, Explain Immune System The animals and the human ...

Explain Immune System The animals and the human beings are forced to encounter many dangerous microbe in their day-to-day life, through water, air and food. Inside our body the

Enzymes of intestinal juice, Enzymes of intestinal  juice Aminopepetid...

Enzymes of intestinal  juice Aminopepetidase is an  exopeptidase and cleaves peptide bonds next  to N-terminal amino acids of polypeptides and oligopeptides (unlike carboxypept

Medicare operates as vendor payment program, Question 1 Which are the d...

Question 1 Which are the different types of health insurance plans? Explain 2 Define the following terms used in E/M services        a) New and established patient        b) Na

Explain transport of oxygen by plasma, Explain Transport of Oxygen By Plasm...

Explain Transport of Oxygen By Plasma At a tension of 100 mm Hg, 0.3 ml oxygen is dissolved in every 100 ml of blood. This small volume is negligible as far as the oxygen suppl

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