Rapid ToneMembranes of the intestinal cells are relatively immune to the negative for the deployment of monosaccharides soluble in water, amino acids, vitamins, and minerals that make up a large part of the required nutrients. Selectively be transferred these nutrients through membranes of the intestinal cells by carrier-mediated transport. Membrane companies combine and food on the surface of one membrane and pass through the membrane to release on the surface rival. Some simply facilitate the dissemination of material down gradient focus.