Which autonomic receptor is activated by low concentrations of epinephrine released from the adrenal medulla and causes vasodilation?

Question

Quizplus · Accepted Answer

[IC $1 \mathrm{~d}]$. $\beta_{2}$ Receptors on vascular smooth muscle produce vasodilation. $\alpha$ Receptors on vascular smooth muscle produce vasoconstriction. Because $\beta_{2}$ receptors are more sensitive to epinephrine than are $\alpha$ receptors, low doses of epinephrine produce vasodilation, and high doses produce vasoconstriction.

Which Autonomic Receptor Is Activated by Low Concentrations of Epinephrine α\alphaα

Which Autonomic Receptor Is Activated by Low Concentrations of Epinephrine $\alpha$