What percentage of oxygen is typically found in the air that we exhale?

What percentage of oxygen is typically found in the air that we exhale?

• A. 10%
• B. 16%
• C. 21%
• D. 25%

Answer: (B)

The correct answer is that typically, the percentage of oxygen found in the air we exhale is about 16%. When we inhale, the air we take in consists of approximately 21% oxygen, but during the process of respiration, our bodies utilize some of that oxygen for metabolic processes. As a result, when we exhale, the oxygen content decreases to around 16%, as it is transformed into carbon dioxide and other byproducts. The percentage of oxygen in exhaled air reflects the efficiency of gas exchange in the lungs, where oxygen is absorbed into the bloodstream, and carbon dioxide is expelled. Understanding this process is important for assessing respiratory health and function.

The correct answer is that typically, the percentage of oxygen found in the air we exhale is about 16%. When we inhale, the air we take in consists of approximately 21% oxygen, but during the process of respiration, our bodies utilize some of that oxygen for metabolic processes. As a result, when we exhale, the oxygen content decreases to around 16%, as it is transformed into carbon dioxide and other byproducts.

The percentage of oxygen in exhaled air reflects the efficiency of gas exchange in the lungs, where oxygen is absorbed into the bloodstream, and carbon dioxide is expelled. Understanding this process is important for assessing respiratory health and function.