A Medical Student Is Observing a Pharmacology Experiment Where Drug

A medical student is observing a pharmacology experiment where drug A is being intravenously administered to a pregnant dog.  Some parameters that are being recorded during the experiment include heart rate, blood pressure, pupil size, and uterine contractions.  The following diagrams illustrate the measured parameters and observed changes after infusing drug A. Which of the following best characterizes drug A?

A) Beta-adrenergic agonist
B) Alpha and beta-adrenergic agonist
C) Alpha-adrenergic agonist
D) Beta-adrenergic antagonist
E) Alpha-adrenergic antagonist and beta-adrenergic agonist

Correct Answer:

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