Coronary blood vessels will dilate due to (increased/decreased) stimulation of the sympathetic nervous system and will constrict due to (increased/decreased) stimulation of the parasympathetic system.

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The sympathetic nervous system stimulates the release of epinephrine and norepinephrine, which cause vasodilation of the coronary blood vessels. Therefore, increased sympathetic stimulation will cause dilation of the coronary blood vessels. On the other hand, the parasympathetic system releases acetylcholine, which causes vasoconstriction of the coronary blood vessels. Therefore, increased parasympathetic stimulation will cause constriction of the coronary blood vessels.

Coronary Blood Vessels Will Dilate Due to (Increased/decreased) Stimulation of the Sympathetic