Which of these statements applies to extrinsic control of arteriolar radius
A)It is accomplished primarily by the parasympathetic nervous system.
B)It is important in the regulation of arterial blood pressure.
C)It can never be overridden by local adjustments.
D)It is important for oxygen delivery to tissues.

Question

Quizplus · Accepted Answer

Extrinsic control of arteriolar radius refers to the regulation of arterial blood pressure, which is important in maintaining perfusion to organs and tissues. Local adjustments can sometimes override extrinsic control, such as in the case of autoregulation, but extrinsic control still plays a significant role in determining blood flow to the body. Parasympathetic nervous system activity is generally associated with vasodilation, while sympathetic nervous system activity is associated with vasoconstriction, but both systems can exert extrinsic control of arteriolar radius. Oxygen delivery to tissues is also important but is not specifically related to extrinsic control of arteriolar radius.

Which of These Statements Applies to Extrinsic Control of Arteriolar