Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Neural Circuits
The simple all are none activities of a single neuron can hardly provide the adaptability needed for the constant changes faced by the organism in its internal and external environments. Information about the external environment is integrated with signals arising within the organism and transmitted to effectors to elicit a coordinated response. Thus each neuron forms a unit in a communication circuit. A survey of the features of the nervous system in the animal groups at various points on the phylogenetic tree shows that a long evolutionary process has produced the outstanding complex structure of the human brain.
Figure: Nerve Net in Jelly Fish
Protozoans are single celled organisms and clearly cannot have a nervous system. An examination of the electrical properties of the protozoan cell membrane would, however, show many similarities to those of nerve cells including electrical potential changes and currents associated with activity. Coelenterates are of great interest neurologically since they are the first animals to possess a true nervous system. The coelenterate nervous system consists of a diffuse network of neurons that are distributed throughout the body wall. Such a simple and primitive nervous system is termed a nerve net in which neurons are dispersed mostly at random. Though primitive, this arrangement serves the need of a radially symmetrical animal whose food and enemies may approach from all directions. The animal's reaction depends on the strength of the stimulus. Only a part of the body reacts to a weak stimulus and a strong stimulus causes the entire animal to respond. From such diffuse primitively organised system of nerve cells, evolution has produced a complex organized nervous system such as that of man. The system of local nerve nets, however continues to exist even in many advanced invertebrate groups and in the intestines of vertebrates.
Measurements of the level of pollution There are many factor for finding the level of pollution in the waste waters that generally find out the quantity of organic matter susp
what is the advantage of being dark skinned?
Cosmid: The type of artificially constructed vector taken in use for cloning the 35-45 kb of DNA. These are plasmids carrying the phage l cos site (which permits packaging into l
How did the experiments of Redi and Pasteur refute the hypothesis of spontaneous generation? To refute the impulsive generation hypothesis many experiments were performed. The
Each of the following are true of antimicrobial therapeutic drugs except A. Non-toxic to host B. Easily broken down by host C. Easily administered D. Limited capacity to elicit
Q. Spoilage of Fish and other Sea Foods Fish and other marine foods are second only to meat and poultry as a staple animal food around the world. India is one of the important f
Molluscus - Hormones in Growth and Reproduction We know quite well about the endocrine mechanism of growth and reproduction in the freshwater snail Lymnaea stagnalis. This is
Which of the below is NOT hormone associated with male reproductive physiology: a) Prolactin b) Testosterone c) Interstitial hormone d) Follicle-stimulating hormone
The cytosolic surface of the erythrocyte plasma membrane is covered through a network of peripheral membrane proteins which make up the cytoskeleton in the figure. The
Q. Explain Inborn Errors of Metabolism? Some of the disorders caused by inborn error of metabolism namely phenylketonuria, tyrosinemia, maple syrup urine disease, homocystinur
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd