A Patient Is Admitted to the Intensive Care Unit for Treatment

A patient is admitted to the intensive care unit for treatment of shock. The prescriber orders isoproterenol [Isuprel]. The nurse expects this drug to increase tissue perfusion in this patient by activating:

A) alpha₁ receptors to cause vasoconstriction.
B) alpha₁ receptors to increase blood pressure.
C) beta₁ receptors to cause a positive inotropic effect.
D) beta₂ receptors to cause bronchodilation.