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[Absorption study of 3H-stearic acid in the rat small intestine using electron microscopic autoradiography].

Using electron microscope autoradiography evidence was provided on the space time character of the absorption, resynthesis, transfer and exocytosis of lipids in the form of chylomicrons; this evidence correlating with data on distribution in the subcellular compartments of epithelial cells of the intestine. The majority of fatty acid enters the lymph in the form of resynthesized lipids. Part of fatty acid is transported from the enteral environment to the internal one, escaping from the stages of esterification and triglyceride and chylomicron formation in the endoplasmic reticulum and Golgi apparatus.