COMT inhibitor drugs used for Parkinson's disease inhibit the enzyme COMT. This enzyme normally ________
A) metabolizes the drug levodopa in the blood
B) decreases the tremors and rigidity of Parkinson's disease
C) inhibits the action of acetylcholine
D) blocks levodopa from crossing the blood-brain barrier
Answer: A
B) The enzyme COMT does not decrease the tremors and rigidity of Parkinson's disease
C) The enzyme COMT does not inhibit the action of acetylcholine.
D) The enzyme COMT does not block levodopa from crossing the blood-brain barrier.
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