During inhalation, we take in air containing many gases but our body uses only oxygen. Which is the gas that is exhaled out?
A
(b) and (c) above.
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B
Carbon monoxide
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C
Sulphur dioxide
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D
Carbon dioxide
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Solution
The correct option is D Carbon dioxide Inhalation/inspiration is the process by which air is taken in through the nose and is passed to the lungs. Oxygen from the inspired air goes into the blood. Blood carries the carbon dioxide from various parts of the body towards the lungs and is released through exhalation/expiration.