The motor symptoms of Parkinson's disease
A) result from neurodegeneration of the corpus callosum.
B) result from the formation of MPTP from dopamine in synaptic vesicles.
C) result from the intravenous abuse of amphetamine.
D) can be treated using L-DOPA.
E) can be treated using drugs that activate MAO in dopamine neurons.
Answer: D
Rationale: The motor symptoms of Parkinson's disease can be treated using L-DOPA.
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