<prompt> Mercury affects which pa of the kidneyPCTDCTCollecting ductLoop of Henle  <response>: PCT Pattern in Acute tubular necrosis Ischemic type Tubular necrosis is patchy, relatively sho lengths of tubules are affected Straight seg. of proximal tubules and ascending limb of Henles loop are most vulnerable Toxic necrosis Mercury PCT is mainly involved Lead Entire tubule is damaged 