Nervous system and sense organs, Biology

Assignment Help:

Nervous System and Sense Organs

The non-chordates also perform a variety of activities such as feeding, digestion, locomotion etc. For this aim, they have corresponding organs and organ systems working in a coordinated way. Furthermore, the environment of the animal, both internal and external, is never stable and the animal has to change its activities in relation to the changing environmental conditions. This involves escape from adverse climatic conditions or from a pursuing predator, catch food to overcome hunger, digests the food for energy needs, excrete waste material, and regulate the respiratory rate and so on. Towards this purpose, the concerned organs must be coordinated in an efficient and purposeful manner. This is brought about mostly by the nervous system.

Essentially, the animal has to perceive any change in the environment, compute the changes and finally translate these computations into requisite actions in a manner most profitable and adaptive to the animal. In the direction of this goal the nervous system has receptor components consisting of sense organs, coordinating centers in the central nervous system and the motor components controlling the motor elements. The system is connected all through so to say, by cables of nerves through which messages or impulses flow as if on a telegraphic system. The receptor organs receive messages from the environment that are transmitted to the central nervous system. The central nervous system is the decision centre that sends requisite orders to the effector organs through motor neurons.


Related Discussions:- Nervous system and sense organs

Is NADH oxidized by the electron transport chain, The oxidation of glucose...

The oxidation of glucose produces NADH that is oxidized by the electron transport chain. What compound is the terminal electron acceptor of the electrons carried by NADH? -O2

Explain the cardiovascular effects, Explain the Cardiovascular Effects? ...

Explain the Cardiovascular Effects? You must have heard of the 'French Paradox'. The lower incidence of heart attacks in certain areas of France despite higher prevalence of fa

Obtain half their genes from one parent, If children obtain half their gene...

If children obtain half their genes from one parent and half from the other parent, why aren't siblings identical?

What is the significance of proteins for living beings, Q. What is the sign...

Q. What is the significance of proteins for living beings? Proteins play an essential role in nearly all biological processes. Due to their variety they can suppose many divers

State the swinging flashlight test, State the Swinging Flashlight Test ...

State the Swinging Flashlight Test The patient looks into the distance while the examiner shines a bright light first into one eye for a few seconds and then the other. As the

Explain the dimensions of practice of nutrition care process, The nutrition...

The nutrition care process acknowledges the common dimensions of practice by  the following: Defining a common language that allows nutrition practice to be more measurable,

Phylum chordata, PHYLUM CHORDATA Definition and Introduction Bila...

PHYLUM CHORDATA Definition and Introduction Bilateral  and deuterostomial  eucoelomate eumetazoa, basically  possessing ,in  the embryo  or throughout life , a flexible,

Permanent wilting percentage (pwp), Permanent Wilting Percentage (PWP) ...

Permanent Wilting Percentage (PWP) It is the percentage of moisture in the soil at which a plant wilts and does not recover unless water is added to the soil. PWP for clay is

What are the five classes of vertebrates, Q. What are the five classes of v...

Q. What are the five classes of vertebrates? To which of these do human beings belong? The five classes of vertebrates are amphibians, reptiles, fishes (osteichthyes and chondr

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