Introduction Answers

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Why is gas exchange crucial to sustaining life? Select all that apply.

It rids the body of carbon dioxide.

It allows the body to take in carbon dioxide.

It provides the body with oxygen.

It transports blood around the body.

When does oxygen uptake in the alveoli increase? Select all that apply.

Carbon dioxide in the body decreases.

Oxygen in the body decreases.

Oxygen in the body increases.

Carbon dioxide in the body increases.

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