Structure and properties of Biological membranes.

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…of the loop of Henle. Also, in the membrane for the Collecting Duct and Distal Proximal Tubule there are receptors for the hormone ADH. This is vital to the workings of the kidney as it is a means of controling how much water is retained or allowed to stay in the urea and so be excreted from the body. ADH controls the opening of ionic protein channels to let water move out into the medulla.