autoregulation
noun
au·to·reg·u·la·tion
ˌȯt-ō-ˌreg-yə-ˈlā-shən
: the maintenance of relative constancy of a physiological process by a bodily part or system under varying conditions
especially
: the maintenance of a constant supply of blood to an organ in spite of varying arterial pressure
the influence of vasoactive agents on autoregulation of renal flow —Science
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Merriam-Webster unabridged
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