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A 21-year-old male asked:

What hormone activate adenosine a2a receptor to widen the arteries and when is it released?

1 doctor answer1 doctor weighed in
Dr. Payam Mehranpour
Cardiology 23 years experience
Local: Adenosine has a very short half life (only a few seconds). It is not in that sense a "circulating hormone". It's effects are mainly local and produced by cells, including heart muscle. It's production increases when there is need for increased circulation and blood flow to the heart, such as physical stress.

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Last updated Jun 24, 2014
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