The Wall of Which Structure Secretes the Disaccharidases

Question

The wall of which structure secretes the disaccharidases?
A) Gallbladder
B) Duodenum
C) Pancreas
D) Stomach

Accepted Answer

The duodenum is the first part of the small intestine and is responsible for receiving partially digested food from the stomach and secreting enzymes to aid in digestion. The wall of the duodenum secretes disaccharidases, which are enzymes that break down disaccharides (such as sucrose, lactose, and maltose) into their component monosaccharides (glucose, fructose, and galactose) so that they can be absorbed into the bloodstream. The gallbladder stores and releases bile, the pancreas secretes digestive enzymes and bicarbonate, and the stomach secretes gastric juices, but none of these structures are responsible for secreting disaccharidases.