Why does caffeine keep you awake?

Caffeine has a chemical that is just like adenosine, which makes us sleepy. Adenosine makes you drowsy because it slows down your cell activity. Caffeine builds up our brain whenever we are awake. Caffeine produces "a boost of energy" to keep us awake. For example : When we drink a cup of coffee, which contains caffeine would make us

What is caffeine?

Caffeine is a drug that is produced from many plants. It controls our nervous system which causes alertness. Caffeine can affect the amount of sleep we get. Caffeine is not stored in the body, but you can feel the effect it has. Caffeine can cause us to urinate more. It can help us lose some calcium which can cause bone loss. Caffeine can cause heart problems. Caffeine is in many medications.

What is caffeine? - Link