Your pupils dialate, your blood pressure rises, as a response your livers dumps more sugar into your bloodstream.The adenosine receptors in your brain are now blocked preventing drowsiness.

• 由于肝脏将大量糖分转化到你的血液中，你的瞳孔放大，血压上升，你大脑中的腺苷接受器就会抑制你的睡意。