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As @Roshelle Perera points out, the textbook reason for differential solute and water movement in different parts of the LoH is osmolarity, which is nicely explained in this wikipedia article. Coming to an interesting point, about the movement of water across cell membranes through aquaporins, this is helpful:{1} The discovery of aquaporin membrane water ...


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Water across cell membranes occurs due to osmosis( which is based on a concentration gradient). so water diffuses through the cell membrane. sometimes water channels called aquaporins can be found. https://www.anaesthesiamcq.com/FluidBook/fl1_2.php https://www.sciencedirect.com/topics/pharmacology-toxicology-and-pharmaceutical-science/aquaporin In the loop ...


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