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.
assignment order
Which of the following properties of dsDNA is imprtant for DNA purification? A. Hydrophilic B. Positively charged phosphate backbone C. Can only bind to divalent cations
Which one of the following is not a lateral meristem? 1. Intrafascicular cambium 2. Interfascicular cambium 3. Phellogen 4. Intercalary meristem Intercalary m
What kinds of mutation in disease-causing bacteria might make them more dangerous Pathogenic bacteria will become more dangerous to us if mutations make them more virulent or r
How we can measure perimplant PD Perimplant PD should be measured routinely during maintenance appointment with a less probing force (0.2 to 0.3 N) as the tissue is more sensit
How do carrier proteins transport substances across cell membranes? Carrier proteins bind to a molecule of the substance on single side of the membrane, change shape, transpor
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
What is the carbon cycle? The carbon cycle shows the circulation and recycling of the chemical element carbon in nature as a result of the action of living beings. Photosynt
Define Key Concepts and Facts about Disaccharides? 1. All disaccharides contain 2 monosaccharides. 2. Disaccharides are linked by glycosidic linkage. 3. If both the functional
What are the stomata? How these structures participate in the plant transpiration? The Stomata (singular, stoma) are small specialized passages for gases and water present in t
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