I want to know the answer to the following question:
Serotonin is a neuromodulator that is involved in regulation of what?
All the background I'm provided with is that "The effect of serotonin is not limited to the limbic system: Several serotonin receptors have their gene expression change dramatically during adolescence, particularly in the human frontal and prefrontal cortex .". Is that enough to answer the question?
Answer: no