Food as fuel for the body machine, Science

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.  

 

Posted Date: 9/28/2012 7:22:02 AM | Location : United States







Related Discussions:- Food as fuel for the body machine, Assignment Help, Ask Question on Food as fuel for the body machine, Get Answer, Expert's Help, Food as fuel for the body machine Discussions

Write discussion on Food as fuel for the body machine
Your posts are moderated
Related Questions
why do we breathe?

1. The output of a single neuron is given by y = f(w 1 x 1 +w 2 x 2 +w 0 x 0 ), where x 1 and x 2 are inputs, x 0 has the constant value 1, w 0 , w 1 and w 2 are parameters

Why Rainfall is imprtant factor in active soil formation Of the various climatic elements that take part in active soil formation, rainfall or precipitation is the most importa

A hair hygrometer This device will enable you to read the relative humidity directly without the use of tables. Procure a few human hairs about 30 cm long. Free them from gr

3 reasons why Minnesota still has crytosporidiosis

Origin of life  on the earth: Man has always wondered  how he came into existence, who created him, and why he was created. Curiosity in this connection has been so strong that


How soil textural classes categorised and what are is their significance? The soil textural classes are based on the percentage of the separate(s) which contributes maximum to

1. Explain the difference between society and culture. 2. What is the difference between Structural Functionalist Theory and Symbolic Interaction Theory? 3.Explain the differ

What is the minimum depth required for a feature to be considered a canyon? In fact, it is a bit like allowing for when a few grains of sand become a heap of sand: there is no