<prompt> In a person on a very low potassium diet, which part of the nephron would be expected to reabsorb the most potassium?ABCD  <response>: About 65 of the filtered K is reabsorbed in the proximal tubule, and another 20 to 30 is reabsorbed in the loop of Henle. Although most of the daily variation in K excretion is caused by changes in potassium secretion in the distal tubule and CD collecting duct, only a small percentage of the filtered K load can be reabsorbed in these nephron segments. 