Can you get a high score on this cannabis quiz?

For how long have humans been smoking marijuana?

A. 100 years

B. 1,000 years

C. 2,500 years

D. 1,500 years

C. 2,500 years.

The earliest evidence of psychoactive use of marijuana dates from 2,500 years ago in the funerary incense burners in the Pamir mountains of central Asia.

According to science, marijuana use should be legal at what age?

A. 21

B. 13

C. 45

D. 19

D. 19

Research shows that negative cognitive effects of marijuana use starting at age 19 are similar at age 21, and lowering the age limit could prevent teens from seeking out illegal methods of obtaining the drug.

Marijuana is hypothesized to affect individual brains differently because of...

A. THC dosage

B. Frequency of use

C. The mechanics of how THC interacts with cannabinoid receptors in the brain

D. All of the above

D. All of the above. All three of these factors can affect how cannabis affects the brain.

Sustained marijuana use in young people raises their risk of which life-threatening condition?

A. Heart disease

B. Stroke

C. Alzheimer's Disease

D. Dementia

B. Stroke. Researchers reported that people who used cannabis — but not tobacco — for more than 10 days per month were about twice as likely to have a stroke compared to non-users.

When stressed or anxious, many people turn to cannabis. Which biological system does marijuana act on to influence mood?

A. The endocannabinoid system

B. The brain's pleasure centers

C. The nervous system

D. Metabolism

A. The endocannabinoid system. Research in mice pinpointed a powerful molecule called 2-AG, which like cannabis, can modulate anxiety.