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Default Repeated USMLE Questions Step 1- 2292
Q- Which of the following is the mechanism of action of selegiline in treating Parkinson’s disease?
A- Agonist at dopamine receptors
B- Blocks catechol-O-methyltransferase (COMT)
C- Inhibition of MAO type B to reserve dopamine
D- Precursor of dopamine

Q- Which of the following is the mechanism of action of zileuton for asthma?
A- Inhibition of 5-lipoxygenase
B- Inhibition of phosphodiesterase
C- Inhibition of Phospholipase A
D- Stimulation of beta-2 receptors

Q- Which one of the following effects is caused by administration of mecamylamine?
A- Hypertension
B- Pupillary constriction
C- Tachycardia
D- Tremors

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