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Question

_____ and ______ are produced and released in exhaled air.

A
CO2 and H2
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B
H2O and H2
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C
CO2 and water vapour
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D
None of the above
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Solution

The correct option is C CO2 and water vapour
Respiration is defined as the movement of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction. The oxygen from air oxidises food substances mainly glucose in their body cells and release energy in the form of heat.

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