Kidney stones occur when solid material blocks the flow of urinein the renal system. Although there are many causes, Ca2+ is acommon component of the stone itself. If left untreated, Kidneystones can lead to renal failure. You are a Nephrologist treating apatient who has already had one kidney removed. They report thatthey have experienced nausea, vomiting, and swelling of theextremities (edema.) An MRI shows a kidney stone which hascompletely blocked the ureter of the remaining kidney. Propose amechanism whereby the kidney stone would explain the patient’ssymptoms.