Energy inside the Human Body


 
 
Concept Explanation
 

Energy inside the Human Body

Energy inside the Human Body

The human body is a complicated system in which a variety of energy changes take place. A number of activities take place inside the body - some increase the energy of the body ans some reduce it. The main source of energy for the body is food. How weak you feel if you do not eat for a day! Energy is used up when the muscles are stretched, the heart pumps blood, and so on. Work is done by the forces inside the body in such activities, and hence, the energy is reduced. We feel tired when the energy of the body is used up beyond a limit.

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Sample Questions
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Question : 1

We feel _____________ when the energy of the body is used up beyond a limit.

Right Option : B
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Question : 2

Which of the following are correct :

(a) We feel tired when the energy of the body is used up beyond a limit.

(b) When you stand for a long time, the muscles of your body are stretched and the heart has to pump more blood to them.

Right Option : C
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Question : 3

Where is energy used inside the human body ?

Right Option : D
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