Distal Tubule

The distal tubule (DT) is a portion of kidney nephron between the Loop of Henle and the collecting duct system.This segment is composed of a tight epithelium with little water permeability. It reabsorbs ~5% of the NaCl filtered from the initial urine. In addition, it is partially responsible for regulation of potassium and calcium filtrate levels, as well as its pH.