Why do we need to exchange oxygen and carbon dioxide?

We need

C O_{2}

to breakdown glucose, of which oxygen is a by-product.

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We need oxygen to breakdown glucose, of which

C O_{2}

is a by-product.

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We need

C O_{2}

to breathe and produce oxygen as a byproduct of digestion.

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We need oxygen to breathe and produce

C O_{2}

as a byproduct of digestion.

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Solution

The correct option is B We need oxygen to breakdown glucose, of which $C O_{2}$ is a by-product.
Cellular respiration is a process of breaking down of glucose with the help of oxygen to produce $C O_{2}, H_{2} O$ and energy. Hence, we breathe in order to take in oxygen and give out the carbon dioxide that is continuously being formed.

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Similar questions

Which organisms do not need oxygen to break down glucose and produce energy?

Q. Why do we need to exchange oxygen and carbon dioxide?

When we breathe oxygen in, we exhale CO₂ within seconds. Is the CO₂ we breathe out the by-product of the respiration which happened with the oxygen we just breathed in?

During breathing we inhale oxygen. Why does our cells need oxygen? What happens with that oxygen?

Q. Short / Long Answer Types :
What are the three pathways involved in the complete breakdown of glucose to carbon dioxide

(C O_{2})

and water

(H_{2} O)

? What reaction is needed to join two of these pathways?

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