Adenosine slows down nerve cell activity.
Caffeine binds to adenosine receptors and blocks the intake of adenosine.
The result is an increased neuron firing.
The body thinks there is a state of emergency!
The pituitary gland commands the adrenal glands to release adrenaline.
Adrenaline puts the body in a "fight or flight" state.
With an increased level of energy the human subject is ready to follow her objectives!