Blood Flow Through Most Organs Is Regulated Primarily by Increasing

question 29

Multiple Choice

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.

• A)sympathetic; active hyperemia; dilation; extrinsic; intrinsic
• B)sympathetic; reactive hyperemia; dilation; intrinsic; extrinsic
• C)parasympathetic; active hyperemia; constriction; extrinsic; intrinsic
• D)sympathetic; flow autoregulation; constriction; intrinsic; extrinsic
• E)parasympathetic; reactive hyperemia; dilation; extrinsic; intrinsic

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Definitions:

Nutrients

Materials that supply the necessary nutrients for development and sustaining life.

Fresh Water

Water that contains minimal amounts of dissolved salts, making it suitable for consumption, agriculture, and many industrial uses; found in rivers, lakes, and underground aquifers.

Thermocline

A layer in a body of water or in the atmosphere where temperature changes more rapidly with depth or height than it does in the layers above or below.

Temperate Lake

A lake located in a temperate climate zone, characterized by moderate temperatures and seasonal variations.