Which of the following is NOT a mechanism by which sulfonylureas exert their effect?

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Stimulating pancreatic beta cell receptors to increase insulin secretionSuppressing hepatic gluconeogenesisBoosting insulin-dependent post-receptor enzyme activityReducing glucose uptake from the gastrointestinal tractNone of the above

Explanation

Sulfonylureas primarily work by stimulating pancreatic beta cells to release insulin, inhibiting glucose production in the liver, and enhancing insulin's action at the post-receptor level. They do not affect glucose absorption from the gut.