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.
Where is energy used inside the human body ? | |||
Right Option : D | |||
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When you stand for a long time, the heart has to pump _________________ blood to them. | |||
Right Option : B | |||
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Which of the following are correct : (a) A number of activities take place inside the body - some increase the energy of the body ans some reduce it. (b) The main source of energy for the body is food. (c) Energy is used up when the muscles are stretched, the heart pumps blood, and so on. | |||
Right Option : D | |||
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