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.
Why is glucose such a good source of energy for bacteria? 1) Glucose contains six oxygen atoms, which can be used for oxidative phosphorylation and the generation of many ATP molec
Use of micro-organisms to control insect pests, pathogens or weeds constitutes biological control, and the biological agents employed are called biocontrol agents. Micro-organis
Q. Flavour of food product? Flavour factors include both sensations perceived by the tongue, which include sweet, salty, sour and bitter tastes and aromas perceived by the tong
Explain Tropical Rain Forests in biomes? You probably are well aware of the danger that the world's rain forests are facing in terms of extinction! There are huge numbers of sp
What are important terms in accommodation and convergence? Accommodation and Convergence In this section some important terms are included: a. How a person is able to foc
Q. What are the events that mark the end and the beginning of the second interphase period and what happens in the cell in this period? The second interphase period is the S, i
Write short note onApplications of apical dominance in horticulture and agriculture
Deficency Diseases and Metabolic Disorders Nutrients required for life sustenance are grouped into 6 basic classes, viz. water, carbohydrates, proteins, fats, minerals and vita
sea divisions
Q. Can you briefly explain about parasitism? The Parasitism is an inharmonious interspecific ecological interaction in which individuals of a species (the parasites) explore or
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