Doug Notices in His Sample Studies That Marijuana Users Are

question 10

Multiple Choice

Doug notices in his sample studies that marijuana users are much more likely to report using heroin than people who do not use marijuana.He concludes that marijuana must be a gateway drug-a drug that leads to the use of harder substances.What's wrong with Doug's conclusion?

• A) His sample data does not demonstrate causality.
• B) Marijuana users cannot be trusted to report their behavior honestly and accurately.
• C) Doug could never really know without trying marijuana himself and seeing whether it leads to heroin use.
• D) Marijuana users would likely be afraid of needles because they are used to smoking their drug of choice.

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Definitions:

Periaqueductal Gray

An area of the midbrain that, when stimulated, decreases pain.

Dorsal Horn Neurons

are neurons located in the dorsal horn of the spinal cord, playing a crucial role in processing sensory information.

Dorsal Horns

The part of the spinal cord away from the stomach that receives sensory input and that may play an important role in the perception of pain.

Spinal Cord

The main pathway for information connecting the brain and peripheral nervous system, crucial for sensory and motor functions below the head.