<prompt> Which cells in the kidney produce 1,25 dihydroxy - cholecalciferol?Granular cellsProximal convoluted tubule cellsMesangial cellsPeritubular cells  <response>: Ans. B Proximal convoluted tubular cellsRef: Contemporary Nephrology, 1st ed. pg. 164 and Indu KhuranaGranular cellsProduce reninProximal convoluted cellsContain 1 alpha hydroxylase that is essential to produce vitamin D3 Mesangial cellsRegulate RBC leakagePeritubular cellsProduce erythropoietin 