Pass the Cheetos

Can you get a high score on this cannabis quiz?

Jose Luque / EyeEm/EyeEm/Getty Images

Jose Luque / EyeEm/EyeEm/Getty Images

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.

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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.

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

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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.

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