How does expired air compare with inspired air?
A) Expired air contains less oxygen but more carbon dioxide.
B) Expired air contains less oxygen and less carbon dioxide.
C) Expired air contains more oxygen and more carbon dioxide.
D) Expired air contains more oxygen but less carbon dioxide.
E) Expired and inspired air contain the same amount of oxygen and carbon dioxide.

Question

Quizplus · Accepted Answer

During gas exchange, oxygen is taken in and carbon dioxide is produced. When we exhale, we are breathing out the air that has a lower oxygen content and a higher carbon dioxide content, which results in expired air containing less oxygen but more carbon dioxide than inspired air. It is also important to note that expired air may contain other gases such as nitrogen, water vapor, and trace amounts of gases like methane and hydrogen.

How Does Expired Air Compare with Inspired Air