Blood Flow Through Most Organs in the Systemic Circuit Is

question 82

Multiple Choice

Blood flow through most organs in the systemic circuit 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:

Rigid Boundaries

Strict limits set in relationships or systems that are difficult to adjust or cross.

Heritability

A statistical estimate of the proportion of observed variation in a particular trait among individuals in a population that is due to genetic differences.

Statistical Estimate

A value derived from statistical analysis that provides an approximation of a population parameter based on sample data.

Genetic Differences

Variations in the DNA sequences among individuals that contribute to the uniqueness of each person's physical and behavioral traits.