Which statement most accurately describes the understanding of schizophrenia?

Which statement most accurately describes the understanding of schizophrenia?

• A. There is an imbalance of the brain neurotransmitters dopamine and serotonin.
• B. There is a marked increase in brain volume, which causes abnormal functioning.
• C. Schizophrenia develops when at least one parent or distant relative has schizophrenia.
• D. This brain disorder has many predisposing factors and a biological basis.

Answer: (D)

Schizophrenia is best understood as a complex, multifactorial brain disorder with a biological basis. The most accurate statement reflects that many predisposing factors—genetic vulnerability, neurodevelopmental differences, and environmental influences—interact to produce the illness. Neurochemical changes, especially involving dopamine, contribute to symptoms but no single neurotransmitter imbalance explains everything, and brain changes vary rather than showing a universal increase in volume. It isn’t caused simply by having a relative with schizophrenia, though family history raises risk, so inheritance is not determinative. In short, a combination of genetic, biological, and environmental factors together predisposes someone to develop schizophrenia.