abnormal tubuloglomerular feedback response decreased tubuloglomerular feedback response reduced TGF response impaired tubuloglomerular feedback mechanism attenuation of 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 MP:0011296 MPheno.ontology csmith 2011-10-11T03:58:00Z