Organisation of nervous system, Biology

Organisation of Nervous System

Nervous systems are composed of nerve cells or neurons and glial cells. In the latter half of the 19th century it was strongly believed that nervous systems are composed of complex, continuous mesh-works of cells and processes in protoplasmic continuity along with each other. This theory was termed as the reticular theory and it was strongly supported by Golgi's School. Though, during early 20th century this theory was slowly superseded by the neuron doctrine. The champion of the neuron doctrine was Cajal, who illustrated convincingly that neurons do not physically join or continue with one other but are closely apposed at synapses. The debate on continuity versus contiguity persisted till 1950s, when electron microscopy allowed resolution of cell membranes at neuronal endings, thereby illustrating discontinuity of neurons. The neuron doctrine is the cornerstone of our understanding of nervous system. As per to this doctrine, neurons are discrete cells forming the basic units of the nervous systems.

Posted Date: 2/4/2013 6:16:20 AM | Location : United States







Related Discussions:- Organisation of nervous system, Assignment Help, Ask Question on Organisation of nervous system, Get Answer, Expert's Help, Organisation of nervous system Discussions

Write discussion on Organisation of nervous system
Your posts are moderated
Related Questions
A virus capsid containing vimentin, your protein of interest, gets into the cell nucleus and is broken down with the DNA being released. It is unknown whether the capsids themselve

Swine influenza Swine influenza, a highly contagious disease affecting the respiratory tract of pigs, is c a use d  b y a  vir us b e lo nging t o the ge nus I nflu e nz a vir

Explain about Pergingival Regenerative Therapy In case of one stage implants being treated or when the prosthesis has to be maintained a  Pergingival Regenerative Therapy is d

Japanese encephalitis The Japanese encephalitis is a mosquito-born flavivirus infection that causes encephalitis in human and equines and abortion in pigs, caused by Japanese

Origin of Cell Wall - The cell wall is product of cytoplasm. The cytoplasmic organelles such as endoplasmic reticulum, golgi apparatus play a very important role in the f

Noncompetitive inhibition In  this  type  of  inhibition, the inhibitor binds at  a site  on  the  enzyme  other  than catalytic site. As there is no competition between the s

Consequences of Air Pollution The physiological effects of toxic pollutants on living beings can be of two types: Acute effects and Chronic effects. Acute effec

Categories of Gifted Species This group of nitrogen fixers has been divided into three categories: Rhizobium which includes fast growing species, Bradyrhizobium which

Analysis of the written reports   of  service in relation  to  the fitness, quality and efficiency of the service should be provided. The routine record-checking is always insuffic

what is the longest cell in human body