<unk>  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<unk> , it is most clearly observed in the kidney, the heart, and the brain. Perfusion of these organs is essential for life, and through<unk>  the body can divert blood (and thus, oxygen) where it is most needed.
Autoregulation
Co-stimulation
Reproductive compensation
Neural adaptation
Lateral inhibition
Accommodative convergence
Counterstimulation
Sex selection