abnormal kidney physiology abnormal tubuloglomerular feedback response 2011-10-11T03:56:31Z MP:0011295 MPheno.ontology abnormal TGF response abnormal tubuloglomerular feedback mechanism any anomaly in the blood flow control mechanism that is operated in the juxtaglomerular apparatus of the kidney and involved in renal autoregulation by limiting changes in the glomerular filtration rate. TGF responds to changes in the concentration of NaCl in the tubular fluid at the level of the macula densa csmith