How does caffeine keep us awake? - Hanan Qasim

Approximately how many metric tons of caffeine are consumed globally each year?

• 10,000 metric tons

• 50,000 metric tons

• 100,000 metric tons

• 1,000,000 metric tons

How does caffeine, found in low doses in nectar, benefit insects like bees?

• It makes them toxic to predators

• It helps them remember and revisit flowers

• It makes them fall asleep

• It causes them to fly faster

What is the primary way caffeine helps keep a person awake?

• It increases blood flow to the brain

• It blocks sleep-inducing molecules called adenosine

• It directly stimulates dopamine production

• It makes neurons fire faster

What happens in the brain when someone regularly consumes caffeine, leading to increased tolerance?

• The brain produces less dopamine

• The brain creates more adenosine receptors

• The brain becomes less sensitive to caffeine

• The brain starts producing more adenosine