At the 500 mb level,the amount of oxygen inhaled in a single breath is ____ of that inhaled at sea-level.
A) about the same
B) about one-quarter
C) about one-half
D) about three-quarters

Question

Quizplus · Accepted Answer

At the 500 mb level, the atmospheric pressure is about half of that at sea level, meaning the density of oxygen is also about half. Therefore, the amount of oxygen inhaled in a single breath is about one-half of that inhaled at sea level.

At the 500 Mb Level,the Amount of Oxygen Inhaled in a Single