title: Intestinal absorption. I - General principles of transintestinal transport.
abstract: The paper deals mainly with the principles and the basic mechanisms underlying the transport processes of molecules across biological membranes. The simple diffusion of electrolytes and non-electrolytes, the chemically-facilitated diffusion and the active transport are briefly discussed. These transport mechanisms are utilized also by substances moving through the intestinal epithelium even if this tissue has a rather complex structure.
mesh_terms: D001693:Biological Transport, Active; D004058:Diffusion; D004573:Electrolytes / Q000378:metabolism; D004848:Epithelium / Q000378:metabolism; D007408:Intestinal Absorption; D007413:Intestinal Mucosa / Q000378:metabolism*; D008954:Models, Biological
chemical_list: D004573:Electrolytes