In the physiology of the kidney,<unk>  <unk>  is a<unk>  system inside the kidneys. Within each nephron, information from the renal tubules (a downstream area of the tubular fluid) is signaled to the glomerulus (an upstream area).<unk>  is one of several mechanisms the kidney uses to regulate glomerular filtration rate (GFR). It involves the concept of purinergic signaling, in which an increased distal tubular sodium chloride concentration causes a basolateral release of adenosine from the macula densa cells. This initiates a cascade of events that ultimately brings GFR to an appropriate level.
Tubuloglomerular feedback
Natural apophyseal glides
Retrograde perfusion
Renal urea handling
Renal sodium reabsorption
Reproductive compensation
Renal chloride reabsorption
Lymphatic pump