In the lung's alveoli, there are four gases mixed together: O₂, carbon dioxide, nitrogen, and water vapor. At a normal barometric pressure of 760 mm Hg, alveolar O₂ exerts a partial pressure of 100 mm Hg, CO₂ 40 mm Hg, and water vapor 47 mm Hg. What is the alveolar partial pressure of nitrogen?

Question

Quizplus · Accepted Answer

Dalton's law describes the relationship among the partial pressure and the total pressure in a gas mixture. According to this law, the total pressure of a mixture of gases must equal the sum of the partial pressures of all component gases. Moreover, the principle states that the partial pressure of a component gas must be proportional to its percentage in the mixture.

In the Lung's Alveoli, There Are Four Gases Mixed Together