<unk>  is a specific form of homeostasis used to describe the tendency of the body to keep blood flow constant when blood pressure varies..
While most systems of the body show some degree of<unk> , it is most clearly observed in the kidney, the heart, and the brain. Perfusion of these organs (especially the latter two) is essential for life, and through<unk>  the body can divert blood (and thus, oxygen) where it is most needed.
One key component of<unk>  is the absence of central control. The "auto" in<unk>  refers of the abiliity of the organ to maintain a stable flow without the involvement of the autonomic nervous system.
Autoregulation
Allosteric regulation
Desensitization 
Stacking 
Transactivation
Emotional contagion
Extraction 
Homeostasis