The Focus on Neuroscience box, "Dopamine Receptors and Obesity," discussed a PET scan study comparing the brains of normal-weight individuals and obese individuals. One finding in the study was that as a person's body mass index increased, the number of:
A) dopamine receptors also increased.
B) serotonin receptors also increased.
C) dopamine receptors decreased.
D) serotonin receptors decreased.

Question

Quizplus · Accepted Answer

The study found that as a person's body mass index increased, the number of dopamine receptors decreased. This suggests that obese individuals may have reduced dopamine signaling in their brains, which can lead to overeating and further weight gain. The study did not find a correlation between serotonin receptors and obesity.

The Focus on Neuroscience Box, "Dopamine Receptors and Obesity," Discussed