The regional aerial resistance of the mesentery and kidney is reduced by-
The D1 receptor in renal and mesenteric blood vessels are the most sensitive. I/V infusion of low dose of dopamine dilates these vessels (by raising intracellular cAMP). This increases GFR in addition dopamine exes natriuretic effect by D1 receptors on proximal tubules.
Dopamine
Nor adrenaline
Adrenaline
Isoprenaline
Excretory System (Kidney, Bladder) Acid-Base Balance