The Ultimate Caffeine Quiz

Estimated Completion Time
1 min
The Ultimate Caffeine Quiz
Image: teetuey/ThinkStock

About This Quiz

It wakes you up, gets you going, and may even cure your headache. But how much do you really know about caffeine?
What percentage of Americans consume caffeine every day?
50 percent
75 percent
90 percent
What is caffeine's medical name?
trimethylxanthine
tryptamine
glucose
How many milligrams of caffeine does the average 6-ounce cup of coffee contain?
400
100
250

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What sleep-inducing chemical does caffeine block from binding to nerve cells?
dopamine
oxytosin
adenosine
Which neurotransmitter, or chemical messenger, does caffeine stimulate?
dopamine
epinephrine
serotonin
How long does it take your body to rid itself of just half the caffeine you consume?
one hour
six hours
12 hours

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Which is not an effect of caffeine?
sweaty palms
dilated pupils
decreased blood flow to the stomach
How might caffeine help cure a headache?
increase heart rate
constrict blood vessels
increase energy
Which of these is a symptom of caffeine withdrawal?
headache
nausea
shortness of breath

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Which illegal drug has a similar effect as caffeine on your body?
marijuana
barbiturates
cocaine