title: Comparative aspects of salt and water transport across lung.
abstract: Calculation suggests that the outward flux of water from the surface of the lung into the expired air could be driven by a relatively small standing osmotic gradient. The structure of this alveolar epithelium does not appear to possess the characteristics of a typical secretory epithelium. These considerations argue against the occurrence of active transport in the alveoli of the adult mammalian lung.
mesh_terms: D000818:Animals; D001693:Biological Transport, Active; D001834:Body Water / Q000378:metabolism*; D002199:Capillary Permeability; D006801:Humans; D008168:Lung / Q000378:metabolism*; D009995:Osmosis; D011650:Pulmonary Alveoli / Q000098:blood supply / Q000378:metabolism; D012119:Respiration; D012964:Sodium / Q000378:metabolism*
chemical_list: D012964:Sodium