How do neurotransmitters like serotonin, dopamine, and norepinephrine affect mood and behavior, and what implications do deficiencies or excesses in these chemicals have for mental health disorders such as depression and schizophrenia?

Neurotransmitters like serotonin, dopamine, and norepinephrine play crucial roles in regulating mood and behavior. Serotonin influences mood, anxiety, and happiness. Dopamine affects motivation, reward, and pleasure. Norepinephrine impacts alertness and arousal. Deficiencies or imbalances in these neurotransmitters can lead to mental health disorders. Low serotonin is linked to depression, while excess dopamine can contribute to schizophrenia. Proper balance is essential for mental well-being.

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