The enterohepatic circulation.

摘要: Any substance secreted in bile which is reabsorbed from the intestine and returns to liver appear once again may be said undergo an enterohepatic circulation (EHe). Accepting this defini­ tion, list of endogenous exogenous substances with EHe formidable. The lipids bile, cholesterol, phospho­ lipids, salts, provide examples all circulations but widely differing efficiencies (assuming that 100% absorption reexcretion most ef­ ficient EHe). Of these biliary salts important since individual molecules both cho­ lesterol lecithin, principal phos­ pholipid also circulate back they considered as having EHe. Based on studies labeled for cholesterol was postulated 1952 1 later by other authors. 2-~ Endogenous probably mainly absorbed je­ junum 5 fraction, a small percentage reappear hav­ ing followed circuitous route lym­ phatic transport, systemic circulation, hepatic artery, liver, ~md bile. However, there are many intermediate pools molecule become sidetracked way therefore, does not