Which Statement BEST Describes Why a Higher Concentration of Carbon

question 76

Multiple Choice

Which statement BEST describes why a higher concentration of carbon dioxide is present in exhaled breath compared to inhaled breath?

• A) Actually, a higher concentration of carbon dioxide is present in inhaled breath.
• B) Once the oxygen is used up in an inhalation, a larger percentage is carbon dioxide.
• C) The oxygen in inhaled air reacts in the lungs to make carbon dioxide.
• D) The concentration of carbon dioxide in the tissue is lower than that in exhaled air.
• E) Carbon dioxide is produced during cellular respiration and then carried by the blood to the lungs to be exhaled.

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