Food as fuel for the body machine, Science

Assignment Help:

Food as fuel for the body machine:

Body requires food for internal as well as external activities and for growth. Another way of  looking at this is that the body requires energy for both  its internal and external activities. In  this sense, the body can be compared with a machine and food is the fuel which is required to run the body. Energy is produced  in  the body from food by a process called metabolism which is comparable to combustion or burning of a fuel. Oxygen is used up in this 'combustion'  and carbon dioxide is produced. If  the body does not get at least a minimum of energy,  it will not be able to carry on  its normal  internal functions or undertake external work. However, a major difference between a machine and the human body  is that the latter is combsed of  the same fuel which it uses to provide energy. A machine cannot use itself as fuel to run. But our body cah. Thus, during fast the body can bum  its own fats  to get energy, resulting in  loss of weight. If  a body  is supplied with more energy than  is required to run it, it is stored in the body in the form of fat for future use. Energy requirements of  the body are measured in terns of "calories"  or kilo-calories (1000 calories), usually written as Calories, with a capital C. For example, a tea spoon of  sugar (5 gm), when burnt, produces 20 Calories of heat. Scientists  have studied energy requirements of  infants, girls, boys and adults  of different ages and weights to find out how many Caloties they use in doing different things. You would be curious to know how much food is required to keep our body healthy and active. In order to calculate this, we need to know  : i)  energy value of different nutrients and ii) factors influencing the energy requirement of an  individual.  

 


Related Discussions:- Food as fuel for the body machine

Substantial amounts of corundum and magnetite, What common type of paper ha...

What common type of paper having substantial amounts of corundum and magnetite? Sand Paper

Segnificant figure, give the importants segnificant figure in measure quant...

give the importants segnificant figure in measure quantities

Define the olfactory area of the cerebrum, Define the olfactory area of the...

Define the olfactory area of the Cerebrum The olfactory area lies deep within the temporal lobe. Look at Figurefor its position. Cells receive and interpret impulses from nose

Decline os science, explain the factors that led to the decline of science ...

explain the factors that led to the decline of science in europe during iron agen..

State about the lateritic soils, State about the Lateritic soils Later...

State about the Lateritic soils Lateritic soils formed at high levels have a pale red colour, have high gravel content and are poor in all fertility constituents.  Those forme

Explain haloenzyme, Haloenzyme :- A  whole  enzyme,  as a  complete  and...

Haloenzyme :- A  whole  enzyme,  as a  complete  and  functional molecule. Generally, a holoenzyme consists of a polypeptide portion (an apoenzyrne) and at least one cofactor or

Holozoic and holophytic, difference between holozoic mode of feeding holoph...

difference between holozoic mode of feeding holophytic

Motion in one dimension, what is the speed and velocity of a car that trave...

what is the speed and velocity of a car that travels 32 meters to the east and 12 meters in the same direction? the total time of travel in 3.0 seconds

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