Question

Mention any two points of difference in the quality of inspired and expired air.

Answer 1

Inspired air	Expired air
During inspiration, amount of oxygen absorbed at the alveolar surface is 20.96%.	During expiration, amount of oxygen absorbed at the alveolar surface is 16.4%.
During inspiration, amount of carbon dioxide released at the alveolar surface is 0.04%.	During expiration, amount of carbon dioxide released at the alveolar surface is 4%.