Special sensors present in the walls of the heart and the arteries can sense the blood pressure. Baroreceptors, the title of special sensors. Baroreceptors sense blood pressure measurement & then convey signals to the kidneys, the arterioles, the heart and the veins that force them to make changes that lower or increase Blood Pressure. There are many techniques in which blood pressure can be adjusted:

Blood ejection will be more with each shrinking if heart increases speed & contracts quickly. Finally, high blood pressure as both these responses increase the blood flow into the arteries.

Veins perform two movements expansion and contraction. Whenever expansion movement is carried out more blood get reserved in the veins and the heart could not get enough amount of blood. This results in low BP as the heart gives out less blood. Differently, When the veins contract, less amount of blood get collected into veins, more blood comes back to The heart in order to pump into arteries, and, therefore, the heart give out more blood and BP is elevated.

The arterioles can expand and narrow. Enlarged arterioles build less defense to the flow of blood & lower blood pressure while contracted arterioles develop more and more resistance & elevate blood pressure.

Decreasing or increasing amount of urine may even signify the modifications in blood pressure. The urine is generally water which is eliminated of the blood thus if a kidney creates further urine, volume of blood which fills the arteries and veins decreases, & it lowers BP.