Question

Where does the carbon dioxide come from
that we exhale during cellular respiration?

Answer 1

Answer:

The carbon we breathe out as carbon dioxide comes from the carbon in the food we eat. The carbohydrates, fat and proteins we consume and digest are eventually converted by a number of different biochemical pathways in the body to glucose (C6H12O6)

Explanation:

Answer 2

Cellular respiration involves the breakdown of complex food materials. During cellular respiration, glucose is broken down to give carbon dioxide and water. That how we get the CO2 that we exhale.

Respiration is one of the characteristics of living things. Living things take in oxygen and give out carbon dioxide. During cellular respiration, oxygen combines with glucose to yield carbon dioxide and water.

This carbon dioxide produced during cellular respiration as a result of the breakdown of glucose is passed out to the exterior during exhalation.

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