How does our body know ''what to do'', Science

Assignment Help:

How does our body know 'what to do'

Feeling, knowing, doing anything depends on special structures called nerves. Neuronal cells in the body act as various messengers according to the need involved. We are born with all the nerve cells we will ever have. There are about 100-billion nerve cells in our brain. If any nerve cell is somehow damaged, it will not be replaced by a new cell. Each nerve cell is known as a neuron. We will learn about the morphology of the nerve cell in the next section. The nervous system, as you may recall reading earlier, consists of 100-billion neurons and the glial cells. The whole brain is a collection of neuronal and glial cells. These cells are also responsible for higher functions of the brain like learning, memory, speech etc. This fascinating study of biological function of nervous system is called as neurobiology.

So how does our body get to know, what to do? The terminal endings of the nerves are equipped with sensitive receptors. They generate the impulse in relation to any change in the environment i.e., temperature, pressure, touch and send them to main part of the nerve cell, to be transmitted to the brain. The brain receives such messages from various axonal tips. Further brain decides what information has to be processed. If actions are necessary, brain signals the muscles to carry out the work required. We will learn about this mechanism in greater details later here in this unit. A neuron releases its messages as chemicals. These are capable of changing polarity of cells. This is because of the ionic nature of the chemicals. Since it is achieved through movement of ions, we call them ionic channels. Their movement is termed as gait. The ions which play a major role are Ca++, Na++, K+. They are able to create energy for nerve cells to function in a better manner. This creates some amount of electricity in the cell, which can be measured in volts. This principle was discovered by an Italian scientist Alessandre Volta during his experiment on frog leg muscle. We will understand the functioning of the nerve cell better by first getting to know the morphology of the nerve cell.


Related Discussions:- How does our body know ''what to do''

Torque and equilibrium, equilibrium, Physics what is the effect of torque a...

equilibrium, Physics what is the effect of torque and equilibrium on taps, doors,handle bars and bicycles??

Scientific and technical achievements of bronze age, Scientific and Technic...

Scientific and Technical Achievements of Bronze Age:   The major technical advance  that accompanied the rise of cities was the discovery and use of metals, particularly coppe

Shannons theorem, We know from Shannon's Theorem, Maximum data rate of a ch...

We know from Shannon's Theorem, Maximum data rate of a channel in bps (B) = Hlog2 ( 1+S/N ) _ 1 Where H = bandwidth in Hz S/N = signal-to-noise ratio We also know that Db = 10log10

Animal science, Alternative feed ingredients for non-ruminants

Alternative feed ingredients for non-ruminants

How to prevent the erosion of topsoil, How to prevent the erosion of topsoi...

How to prevent the erosion of topsoil Use the trays constructed for the experience above. (a)  Fill the trays with loose soil and tilt everyone the similar amount. Make furr

Layers of the sun, Layers of  the Sun: Tbe Sun's body  is made up of s...

Layers of  the Sun: Tbe Sun's body  is made up of several  layem Tbe  layer that forms  the viable surface of the Sun is called the photosphere-it  is  the surface that demarca

Moisture evaporates from soil, Moisture evaporates from soil Fill a flo...

Moisture evaporates from soil Fill a flower pot with moist soil and place it on a pair of scales. Either balances the pot of soil with weights or observe its weight. Observe it

Explain relationship of vitamins and mineral with physiology, Explain Relat...

Explain Relationship of Vitamins and Mineral with physiology They play a major role in the body's functioning. Vitamin A is necessary for night vision in the eyes. Vitamin B co

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