Which neurotransmitter is involved in enhancing mood but is also affected in conditions like depression?

The correct answer is serotonin. This neurotransmitter plays a significant role in regulating mood, emotions, and overall feelings of well-being. It is frequently referred to as a "feel-good" chemical because of its association with happiness and mood enhancement. In individuals experiencing depression, the levels of serotonin can be disrupted, leading to mood disturbances and feelings of sadness or hopelessness. This connection is well-documented in the field of psychology and psychiatry, where many antidepressant medications aim to increase serotonin levels or enhance its effects in the brain.

Norepinephrine also influences mood; however, its primary roles involve the body’s stress response and arousal, which make its relationship with mood more indirect compared to serotonin. Adenosine primarily regulates sleep and energy levels rather than mood directly. Glutamate is an important neurotransmitter for learning and memory, but its association with mood disorders is not as prevalent as that of serotonin.