Nerve cell - the basic unit, Biology

Assignment Help:

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.


Related Discussions:- Nerve cell - the basic unit

Explain about the proteins, Explain about the Proteins? The term protei...

Explain about the Proteins? The term protein (Greek: proleuo- to occupy first place) was first suggested by Berzelius to describe the complex organic nitrogenous substances fou

Bacillary dysentery, Bacillary Dysentery: You have learnt about the di...

Bacillary Dysentery: You have learnt about the diarrhoea in the foregoing sub-section, now let us take for example a child who has loose motion which contains blood and mucus

State in brief about the soil horizon, State in brief about the soil horizo...

State in brief about the soil horizon A  soil horizon may be defined as "a horizontal layer of regolith, approximately parallel to the soil surface, and possessing relatively

Neurological disorders due to imbalanced nutritional intake, Define Neurolo...

Define Neurological disorders arising due to imbalanced nutritional intake (deficiency or excess)? Common examples are the neurological manifestations  of beriberi, pellagra, p

Coeleterates, what are the characteristics of cleavage formed in coelentera...

what are the characteristics of cleavage formed in coelenterates?

Nutrition, Why is holophytic nutrition a mode of autotrophic nutrition

Why is holophytic nutrition a mode of autotrophic nutrition

State the concept of type locus interaction, State the concept of type locu...

State the concept of type locus interaction Some of the major contributions included the concept of type locus interaction, the analysis of quantitative as opposed to qualitati

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd