Question

a) The normal surface tension in the fluids that line the alveoli is about 15 dynes/cm, when there are normal levels of surfactant present. b) Without surfactant, the surface tension goes up to about 55 dynes/cm. c) p-pressure, d-surface tension, r radius of the alveolus; P-20/r d) Diameter 250 um for a typical alveolus e) Surfactant usually does not start to be secreted until the 6th month of gestation for humarn infants Problem 1) What is the surface-tension pressure (P) for the lungs of an adult with the normal amount of surfactant?

Answer 1