Body systemsQuestion 1676 of 1700
What causes Parkinson's disease?
- Less dopamine is made
- The pancreas makes too much insulin
- A lack of vitamin D
- A blocked artery in the brain
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Correct answer: Less dopamine is made
Low dopamine causes slow movement, tremors, poor balance, and speech trouble.
Source: Nursing Assistant (Reuter), 11.8: Neurological System
Questions last reviewed: 18 October 2026