[Cytophysiology of the absorption cycle of enterocytes].

The protein absorption (albumin and gamma-globulin) by epithelial cells of small intestine of neonatal rats was studied in order to define the duration of its stages, the role of intracellular structures in trensport of the absorbed substances, and the cyclic activity of enterocytes. The volume of the absorbed substances depends on the number and size of pynocytotic formations at the cell apex. The protein transport via cells into interstitia is an active process involving the Golgi complex, mitochondria, and other cellular structures. Due to be intracellular regeneration, the restoration of enterocytes begins from gradual protein unloading and is over when the product has been transported to the lymphatic capillary lumen from interstitia. As a result, the continuous absorption is possible in the mucous layer of small intestine although the villi enterocytes activity is of a cyclic character.