A medical student is carrying out a pharmacology experiment to ascertain the effects of a specific drug. She administers this drug intravenously in various dose ranges while measuring several important hemodynamic parameters. The graphs below show the observed changes in renal blood flow and cardiac output. A medical student is carrying out a pharmacology experiment to ascertain the effects of a specific drug. She administers this drug intravenously in various dose ranges while measuring several important hemodynamic parameters. The graphs below show the observed changes in renal blood flow and cardiac output. Which of the following drugs was most likely used in this experiment?

Question

A medical student is carrying out a pharmacology experiment to ascertain the effects of a specific drug. She administers this drug intravenously in various dose ranges while measuring several important hemodynamic parameters. The graphs below show the observed changes in renal blood flow and cardiac output. A medical student is carrying out a pharmacology experiment to ascertain the effects of a specific drug. She administers this drug intravenously in various dose ranges while measuring several important hemodynamic parameters. The graphs below show the observed changes in renal blood flow and cardiac output.  Which of the following drugs was most likely used in this experiment?

Quizplus · Accepted Answer

Eductional Objective: Dopamine infusion at low doses stimulates D1 receptors in the renal and mesenteric vasculature, resulting in vasodilation and increased blood flow to these sites. Dopamine doses increase the stimulation of 1 and 1 receptors, resulting in increased cardiac output and increased systemic vascular resistance. Increased afterload can result in decreased cardiac output at the upper end of the dose range.

A Medical Student Is Carrying Out a Pharmacology Experiment to Ascertain