5. In general dopamine has a dose dependent action in that it:

			Increases renal and mesenteric blood flow at doses of 1-2 mcg/kg/min.
			Enhances cardiac output with only a slight increase in peripheral resistance at doses of 5-10 mcg/kg/min.
			Greatly increases peripheral resistance at doses greater than 10 mcg/kg/min.
			Has a norepinephrine like effect at doses greater than 20 mcg/kg/min.
			All of the above.