《生理学》 Chapter 6 Digestion and Absorption.ppt

文档介绍：主讲人王竹立Chapter6DigestionandAbsorption1CharacteristicsofSmoothMuscles:slowwavesInnervationofGI:ervoussystem、ervoussystemGutHormones:endocrinecells、actionmode、positionofgastricjuiceandregulationofgastricsecretion、gastricemptyingDigestioninSmallIntestine :compositionofpancreaticjuice、regulationofpancreaticsecretion、TypesofGastrointestinalMotilityAbsorption:FunctionalanatomyofSmallIntestine、☆Restingmembranepotential:-55mv~-60mv,mainlydeterminedbyK+equilibriumpotential,RelatedalsowithNa+andCa++上页返回菜单结束4上页返回菜单结束★Basicelectricalrhythm(slowwaves)arhythmicdepolarizationwave,Myogenic(generatedbyspecializedinterstitialCell)ItalsovaryfromonesegmenttoanotherIt’srelatedtoNa+pump5★Actionpotential:++:releaseNE,:ervereleaseACh(excitatory)orpeptides(inhibitory)VIP,substanceP,:Myentericplexus(Aubach’splexus)Submucosalplexus(Meisner’splexus)ReleaseNE,ACh,PeptidesorNOLocalreflexMaintransmittersinintrinsicplexus粘膜层粘膜下层环行肌肌间神经丛纵行肌浆膜层粘膜下神经丛交感神经节后纤维脊髓传入纤维向心纤维迷走神经传入和传出纤维上页返回菜单结束8GastrointestinalHormone(GutHormone)★.★opencelltypeandclosecelltype★)hormone--endocrine2)parahormone--paracrine3)transmitter&modulater--neurocrine4)neurotransmitter–neuroendocrine5)?--exocrine6)self-regulation上页返回