Which one of the following describes the mechanism of action of omeprazole [Prilosec]?
a. irreversibly inhibits the parietal cell proton pump to block acid secretion
b. antagonist action at acetylcholine receptor blocks acid secretion from the parietal cell
c. blocks release of acetylcholine from mesenteric plexus in gut
d. binds ulcer at low pH to form protective barrier
Ans: a. irreversibly inhibits the parietal cell proton pump to block acid secretion
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