Respiration
Respiration is the release of energy from glucose or another organic chemical, the chemical energy from the glucose will be used to provide the energy needed for growth, repair and movement.
Examples of respiration is when oxygen diffuses out of the air in the lungs into the blood, and carbon dioxide diffuses out of the blood into the air in the lungs.
Another example is when every cell in the body "burns" sugar in the presence of oxygen to make ATP, the form of energy used in the cell, carbon dioxide and water are the by-products.
This reaction is exothermic because it produces energy.
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