Helium gas is maintained at a partialpressure in alveolar gas of PHe,alv= 10mmHg. Blood flow through the lungs is 5L/min, the permeability surface area of thealveolar blood-gas barrier is PHe,M S= 100mL/s, and Bunsen solubility coefficients forHe in blood and barrier are a*He,blood=0.008 mL He/(mL blood* atm) anda*He,M= 0.08 mL He/(ml blood* atm),respectively. Helium is not present in theinlet blood.Find the He flow across the microvascularbarrier of the lung.Compare this with the maximum heliumexchange for very high flow rates (diffusionlimited).Compare the result in part (a) with the He flowwhen the permeability is very high (flow-limited).

Small air sacs called pulmonary alveoli, or simply alveoli, serve as the fundamental respiratory…

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Helium gas is maintained at a partial pressure in alveolar gas of PHe,alv= 10 mmHg. Blood flow through the lungs is 5 L/min, the permeability surface area of the alveolar blood-gas barrier is PHe,M S= 100 L.Lil:L.