Nerve cell - the basic unit, Biology

Nerve Cell - The Basic Unit

The basic unit of the nervous system is the nerve cell or neuron. A neuron is to the nervous system what a brick is to the building. It has a cell body termed as perikaryon and one or more processes termed as neurites. You will see that, functionally, there are three types of neurons. Specific neurons are specialised for perceiving changes in the external or internal environment and transforming or transducing these stimuli into nerve impulses. We call them sensory neurons. A number of neurones are specialised for receiving nerve impulses from other neurones and transmitting these impulses to effector organs such as muscles or glands. These neurones are called motor neurones. Generally, intervening between sensory neurons and motor neurons are one or more association neurons. Association neurones receive impulses from sensory neurones and other association neurons. They as well transmit impulses to other association neurons and motor neurons. So, one or more association neurons may intervene between sensory neuron and motor neuron. Though, sensory neuron may as well transmit impulses direct to motor neuron.

Posted Date: 2/4/2013 6:15:46 AM | Location : United States







Related Discussions:- Nerve cell - the basic unit, Assignment Help, Ask Question on Nerve cell - the basic unit, Get Answer, Expert's Help, Nerve cell - the basic unit Discussions

Write discussion on Nerve cell - the basic unit
Your posts are moderated
Related Questions
Tanapox Tanapox infection is endemic to equatorial Africa and is extremely rare outside Africa. Tanapox was initially recognized in humans in 1957 and 1962 in Kenya. It is caused

Preputial prolapse This deformity is seen in some of the tropical zebu breeds but is not uncommon in European breeds. Initially, it begins as a temperory eversion of a small p

Define the Viscosity of Protein? Viscosity reflects resistance to flow. The main single factor influencing the viscosity behavior of protein fluids is the apparent diameter of

Bone Remodeling Bone remodeling differs from the other means of bone structure alteration in that osteoblasts and Osteoclasts do not act independently but are coupled and bone

Spina Bifida Occulta There is no protrusion of the meninges but the vertebrae are bifid. There are three components of the spina bifida occulta. a) Vertebral- there is

What is aves?

PSYCHOPHARMACOLOGY: Psychotropic drugs are drugs used for mentally ill patients for psychotic and neurotic condition.  1)  Antipsychotic or Neuroleptic Drugs and Anti-parki

What is the prevailing wind direction in equatorial regions affected by the trade winds? a) The wind blows from east to west b) the wind blows from west to east.

Q. What are the Symptoms and Signs of pericardial effusion? Asymptomatic: Slowly accumulating small to moderate pericardial effusion may not cause significant elevation of intr

what are the examples of sex-influenced traits in human?