<prompt> Over half of the potassium that appears in the urine of a patient, who has ingested some potassium salts, is derived fromGlomerular filtrateSecretion by the distal tubuleReabsorption in the proximal tubuleSecretion by the loop of Henle  <response>: In Normal K intake -- The proportion of K by filtration in urine- 23- The proportion of K by secretion in urine Distal tubules and collecting duct- 13In High K intake- - The proportion of K by filtration in urine- 13- The proportion of K by secretion in urine Distal tubules and collecting duct- 23 