<P> The largest component of secreted fluids is ions and water , which are first secreted and then reabsorbed along the tract . The ions secreted primarily consist of H , K , Cl , HCO and Na . Water follows the movement of these ions . The GI tract accomplishes this ion pumping using a system of proteins that are capable of active transport , facilitated diffusion and open channel ion movement . The arrangement of these proteins on the apical and basolateral sides of the epithelium determines the net movement of ions and water in the tract . </P>
<P> The largest component of secreted fluids is ions and water , which are first secreted and then reabsorbed along the tract . The ions secreted primarily consist of H , K , Cl , HCO and Na . Water follows the movement of these ions . The GI tract accomplishes this ion pumping using a system of proteins that are capable of active transport , facilitated diffusion and open channel ion movement . The arrangement of these proteins on the apical and basolateral sides of the epithelium determines the net movement of ions and water in the tract . </P>
absorption is a major function of the gi tract . how is absorption accomplished in the gi tract
absorption is a major function of the gi tract . how is absorption accomplished in the gi tract
active transport , facilitated diffusion
active transport , facilitated diffusion