The use of L-Dopa (Levodopa) in Parkinson's therapy is based on the fact that:
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Correct answer: It can cross the blood-brain barrier
Dopamine itself cannot cross the blood-brain barrier to reach the brain. L-Dopa is a precursor that can cross the barrier and is then converted into dopamine by the enzyme DOPA decarboxylase.
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More Nervous System Disorders questions
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