The Brain from Top to Bottom effects caffeine binds to the brain's adenosine receptors adenosine receptors http://thebrain.mcgill.ca/flas...ml#drogues How Drugs Affect Neurotransmitters production of adrenaline ffects of caffeine on the brain http://thebrain.mcgill.ca/flas...ml#drogues neurotransmitter called adenosine The adenosine makes you sleepy adenosine receptors http://thebrain.mcgill.ca/flas...ml#drogues from the way it acts on the adenosine receptors adenosine receptors caffeine