Final answer:
The renal regulation of glomerular filtration that involves vasodilation or vasoconstriction is known as tubuloglomerular feedback.
Step-by-step explanation:
The renal regulation of glomerular filtration that involves vasodilation or vasoconstriction to maintain constant renal blood flow and glomerular filtration rate is known as tubuloglomerular feedback. This mechanism involves the juxtaglomerular apparatus (JGA), which includes specialized macula densa cells in the distal convoluted tubule (DCT). When there is an increase in glomerular filtration rate (GFR), macula densa cells release ATP and adenosine, which stimulate the myogenic juxtaglomerular cells of the afferent arteriole to constrict, reducing blood flow and GFR. Conversely, when GFR decreases, macula densa cells release less ATP and adenosine, allowing the afferent arteriole to dilate and increase GFR.