Final answer:
Myogenic autoregulation maintains a constant flow rate to the cerebral arteries in response to changes in blood pressure through the constriction or dilation of arteriolar walls.
Step-by-step explanation:
As changes in blood pressure occur, myogenic autoregulation acts to maintain a constant flow rate to the cerebral arteries. The myogenic response includes both constriction and dilation in the walls of arterioles in response to blood flow pressures. This autoregulatory mechanism functions to protect tissues from dramatic fluctuations in pressure and flow, thereby stabilizing blood flow in the capillary network downstream of the arterioles. It's a localized process responding to the stretching of the arteriole's smooth muscle, thus serving as a primary control mechanism for capillary perfusion.