Adenosine is a molecule that plays a role in many different biological processes. It is involved in the #hyperaemic response, which is when the blood flow to the #myocardium (heart muscle) increases in response to #hypoxia or ischemia (lack of oxygen). Adenosine is also involved in #bone remodelling, where it can activate certain receptors to either increase or decrease the development of #osteoclasts (cells that break down bone).