Monosaccharides are absorbed into blood stream. Hydrolysis by these enzymes occurs at specialized locations in the polypeptide. Aminopeptidase and carboxypeptidase work from the ends of the peptide chain clipping off one amino acid at a time. Trypsin, chymotrypsin, and carboxypeptidase are released as zymogens. Insoluble in water, so there is a problem with digestion that is occurring in a primarily aqueous environment.
Fat digestion can only occur at the surface of fat globules.
Lipase in the small intestine works at the surface of the globs and releases glycerol and 3 fatty acids. These are absorbed, then reassembled into triglycerides inside intestinal cells. The triglycerides are then packaged into membranes, transported to golgi then into vesicles into lymph into blood. Absorption Occurs in jejunum and ileum. Absorption requires lots of surface area.