Role of Serotonin in the Nervous System

In the mammalian nervous system, neurotransmitters play a critical role in communication between neurons. One of these neurotransmitters, serotonin, is known to influence mood, anxiety, and various cognitive functions. Dysregulation of serotonin is linked to several psychological conditions, including depression and anxiety disorders. Understanding the mechanisms by which serotonin acts, as well as its synthesis and receptor interactions, is crucial for comprehending its role in both normal physiology and pathology.

Which of the following statements about serotonin is true?