Differences between the Nephrons Size Number in AA/EA Renin percentage in diameter production Cortical small 80 to 90 2:1 yes nephron Juxtamed big 10 to 20 1: 1 or 1: 1+ no nephronDifferences between the Nephrons Size Number in percentage A.A / E.A in diameter Renin production Cortical nephron small 80 to 90 2:1 yes Juxtamed nephron big 10 to 20 1:1 or 1:1+ no