Gastric bypass surgery involves creating an alternate pathway for food that bypasses the majority of the stomach and a portion of the small intestine to help patients lose weight. A schematic is shown below.

Why do you think it is important to attach the duodenum to the jejunum even if food is no longer passing through it?

• A. The gastric juice produced in the bypassed portion of the stomach is needed for digestion in the small intestine.
• B. The duodenum produces brush border enzymes needed for chemical digestion.
• C. Peristalsis in the duodenum will propel chyme through the GI tract.
• D. The duodenum receives bile and pancreatic juices needed for chemical digestion.