Mental illness or mood disorders are a result of?

• A. Changes in the levels of neurotransmitters in the brain
• B. Physical injuries to the brain
• C. Inadequate sleep only
• D. Poor nutrition only

Answer: (A)

Neurotransmitter balance in the brain is closely linked to mental illness and mood disorders. Neurotransmitters such as serotonin, dopamine, and norepinephrine regulate mood, motivation, and sleep, and when their signaling is disrupted, mood symptoms can arise. Treatments that adjust these chemical signals—like certain antidepressants and mood stabilizers—often help alleviate symptoms, highlighting how changes in brain chemistry are a common underlying mechanism.

Other factors like physical brain injuries can cause mood changes through structural damage, and sleep problems or poor nutrition can worsen mood by affecting brain function. But the typical explanation for mood disorders centers on imbalances in neurotransmitter activity, making changes in neurotransmitter levels the best answer.