How does adenosine initiate vasodilation of a coronary arteriole?
A) by binding to second messenger cyclic adenosine monophosphate
B) by activating a protein kinase
C) by binding to an A2A purinergic receptor
D) by phosphorylating an adenosine triphosphate-sensitive potassium channel
E) by hyperpolarizing the cell membrane
Correct Answer:
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