Final answer:
The enzymes of the small intestine act on maltose, lactose, and sucrose, breaking them down into their monosaccharide components which are absorbed into the bloodstream.
Step-by-step explanation:
The three disaccharides that the enzymes of the small intestine act on are maltose, lactose, and sucrose.
Maltase hydrolyzes maltose into two glucose units. Lactase splits lactose into glucose and galactose, which is essential for individuals to be able to digest milk and dairy products. Sucrase or invertase breaks down sucrose into glucose and fructose, the two monosaccharides that make up this common table sugar. These monosaccharides are then absorbed through the wall of the small intestine into the bloodstream for use by the body's cells.