What is "autoregulation"

n. 1 (context biology English) Any of several physiological processes in which an inhibitory feedback system counteracts change. 2 The process that maintains a constant flow of blood to an organ despite changes in arterial pressure.

n. (physiology) processes that maintain a generally constant physiological state in a cell or organism

Autoregulation is a process within many biological systems, resulting from an internal adaptive mechanism that works to adjust (or mitigate) that system's response to stimuli. While most systems of the body show some degree of autoregulation, it is most clearly observed in the kidney, the heart, and the brain. Perfusion of these organs is essential for life, and through autoregulation the body can divert blood (and thus, oxygen) where it is most needed.