Science

Has your coffee addiction taught you anything about coffee?

by JoAnna Wendel
Updated: 
Originally Published: 
Coffee beans in flight on white background
Shutterstock

Shutterstock

Coffee’s caffeine keeps us awake by blocking the binding of which molecule?

A. Adenosine

B. Dopamine

C. Serotonin

D. Cortisol

Shutterstock

A. Adenosine. Adenosine is a broken-down version of adenosine triphosphate, a molecule that provides energy to our cells. As it breaks down, more adenosine is left over, which binds to our cells and signals our body to rest. Caffeine blocks this process, keeping us wakeful.

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