Unlike the proteolytic enzymes, pancreatic amylase and lipase are in the active forms when secreted from the pancreas.Amylase digests starches to oligosaccharides (a carbohydrate composed of a small number of monosaccharides, usually two to four). The enzymes maltase and sucrase, components of enterocyte cell membranes, further digest the oligosaccharides to monosaccharides. Lactase, to digest lactose (milk sugar), is present in enterocytes of young mammals but not in all adults. Lipase hydrolyzes triglycerides into fatty acids and glycerol. This action is most effective after the fats have been emulsified by bile (discussed later).