Determine the Rate of Diffusion in the Gas-Exchange Organ of an Air-Breathing

Multiple Choice

Determine the rate of diffusion in the gas-exchange organ of an air-breathing animal where the area for gas exchange in the lung is 200 mm²,the diffusion constant is 0.08,the PO₂ (partial pressure of oxygen) of the air in the lung is 140 mm Hg,the PO₂ in blood flowing into the lung is 90 mmHg,and the thickness of the gas exchange membrane is 0.001 mm.

A) 800,000
B) 125
C) 00032
D) 10,000,000