Dopaminereceptors seem to track possibilities—an arcing tennis ball that may land in or out—and how expected or unexpected they are.
多巴胺受体有着跟踪潜力—网球的弧线球会落在界内还是界外—是怎样期待还是不期待他们的出现。
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Then the nicotine grabs hold of receptors on brain cells and releases dopamine, the brain's feel-good chemical, bringing feelings of pleasure and comfort.
The scans showed increased blood flow in areas of the brain with high concentrations of receptors for dopamine — associated with states of euphoria, craving and addiction.