<prompt> Answer this question truthfullyHow does fenoldopam exert its effects and what is the result of this action?  <response>: <reason> How does fenoldopam exert its effects and what is the result of this action? Fenoldopam exerts its effects by acting on the dopamine 1 receptor also known as the A s receptor, which increases levels of cAMP. This causes vasodilation in most arterial beds. 