Enzymes and Digestion of Carbs, Proteins, Fats · Physiology

Pancreatic lipase is the most important enzyme for fat digestion. What is the effect of the drug Orlistat on this process?

  1. It stimulates the liver to produce a much greater quantity of emulsifying bile salts
  2. It covalently binds to and inhibits pancreatic lipase, blocking fat absorption
  3. It accelerates the gastric emptying of fatty meals into the duodenum
  4. It closely mimics the action of colipase to enhance lipid breakdown
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Correct answer: It covalently binds to and inhibits pancreatic lipase, blocking fat absorption

Orlistat is a pharmacological inhibitor of gastric and pancreatic lipases. By preventing the breakdown of triglycerides into absorbable fatty acids, it reduces the total caloric intake from dietary fats, often used in weight management.

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