What is autoregulation of local blood flow?

What is autoregulation of local blood flow?

Autoregulation refers to the intrinsic ability of an organ to maintain blood flow at a nearly constant rate despite changes in arterial perfusion pressure. In the kidneys, between perfusion pressures of 80 and 180 mm Hg, GFR and RBF vary less than 10% (Fig. 2-7).

What is autoregulation of blood flow in the tissues?

Autoregulation of tissue blood flow is a mechanism by which tissues control their own blood supply. The mechanism is dependent on an intrinsic capacity of tissues to vary their arteriolar resistance in relation to their needs.

What are the two types of autoregulation of blood flow?

At least two different mechanisms contribute to renal autoregulation: the fast, myogenic, and the slower, tubuloglomerular feedback (TGF), responses.

How is local blood flow regulated?

Blood flow is regulated by vasoconstriction or vasodilation of smooth muscle fibers in the walls of blood vessels, typically arterioles. This regulation can be systemic, affecting the whole of the circulatory system, or localized to specific tissues or organs.

How do we regulate blood flow?

Blood flow through the body is regulated by the size of blood vessels, by the action of smooth muscle, by one-way valves, and by the fluid pressure of the blood itself. Figure 5. Blood pressure is related to the blood velocity in the arteries and arterioles.

Which of the following is an example of local control of blood flow?

Examples of local regulation of blood flow include the following: autoregulation. active hyperemia. reactive hyperemia.

What factors dilate blood vessels?

Vasodilation occurs naturally in your body in response to triggers such as low oxygen levels, a decrease in available nutrients, and increases in temperature. It causes the widening of your blood vessels, which in turn increases blood flow and lowers blood pressure.