PATHOLOGY

Detailed explanation-1: -Tubular Reabsorption Reabsorption of water and ions also occurs in the distal tubule and in the collecting duct. Reabsorption of xenobiotics is usually passive and controlled by the same principles that regulate their passage across any membrane.

Detailed explanation-2: -As fluid travels down the DCT, the luminal potassium concentration increases, indicating that net K+ secretion occurs along the distal tubule. In the early DCT, the rate of K+ secretion is low, but it increases significantly in the late DCT (68–70).