It is structurally similar to adenosine, and is therefore able to bind the same receptors.
In 1819 the German chemist Friedrich Ferdinand Runge first isolated this white, crystalline substance. It is structurally similar to adenosine, and is therefore able to bind the same receptors. The result is an increase in the hormones adrenaline and norepinephrine, causing an increase in heart rate. These effects should seem familiar if, for 10 points, you are a drinker of tea or coffee, both of which contain this substance?
In 1819 the German chemist Friedrich Ferdinand Runge first isolated this white, crystalline substance.
{Caffeine}