Drag each label to the correct location on the image. nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies. stella's urine sample shows the presence of large proteins. john's blood test report indicates a high toxin level. miguel's blood test shows an increase in metabolic waste. janice's urine report shows the presence of vital minerals.