Blood flow through most organs is regulated primarily by increasing or decreasing the ________ activity to arteriolar smooth muscles in the organ.Another form of regulation,called ________,depends upon the metabolic activity of the organ.Increased activity leads to increased interstitial-fluid metabolites,which cause ________ of the arterioles.The former is a type of ________ regulation of blood flow; the latter is an example of ________ regulation.

Question

Quizplus · Accepted Answer

Blood flow through most organs is regulated primarily by the sympathetic activity to arteriolar smooth muscles in the organ, which is a form of extrinsic regulation. Another form of regulation is active hyperemia, which depends upon the metabolic activity of the organ. Increased activity leads to increased interstitial-fluid metabolites, which cause dilation of the arterioles, which is an example of intrinsic regulation of blood flow. Therefore, the correct answer is A: sympathetic; active hyperemia; dilation; extrinsic; intrinsic.

Blood Flow Through Most Organs Is Regulated Primarily by Increasing