Some monosaccharides, such as glucose and galactose, are taken up into intestinal epithelial cells by symport, powered by a Na+ gra- dient (figure 21.26). The N21+ gradient is generated by a N.a+~l(’r pump. Other monosacchaxides, such as fructose, are taken up by facilitated diffusion. Once inside the intestinal epithelial cell, mono-