Fluid propulsion by cat intestinal segments under conditions requiring hydrostatic work.
Fluid propulsion by cat intestinal segments under conditions requiring hydrostatic work.
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在需要静水力工作的条件下，猫肠段进行流体推进。
DOI：
10.1152/ajpgi.1981.240.2.g147
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
Seygal,GE
中科院分区：
文献类型：
--
作者：
Weems,WA;Seygal,GE
本实验在体外研究了猫十二指肠、空肠和回肠作流体静力学功推进液体的内在能力。末端回肠段表现出两种功能状态。在净推进状态下，推进复合物发生在平均间隔为7.9分钟。这些复合物包括一个初始阶段，其特征在于同时喷出相等的流体体积从两端的一段在8/分钟的频率和第二阶段，喷出净体积的流体从aboral结束。不处于净推进状态的回肠段表现出仅由8次/min喷射组成的复合物。在类似条件下评价时，近端十二指肠和空肠中段未能产生净推进。这些结果表明：1）当需要流体静力学功进行推进时，回肠段可以内在地产生反口方向的净流体运输，2）回肠段内在的推进活动由具有8 min有效振荡周期的内在控制机制调节，3）回肠和其他肠区域之间的内在控制结构存在基本差异。
The intrinsic ability of duodenal, jejunal, and ileal segments of cats to propel fluid by doing hydrostatic work was investigated in vitro. Segments of terminal ileum demonstrated two functional states. In the net propulsive state, propulsive complexes occurred at an average interval of 7.9 min. These complexes consisted of an initial phase characterized by the simultaneous ejection of equal fluid volumes from both ends of a segment at a frequency of 8/min and a second phase that ejected a net volume of fluid from the aboral end. Ileal segments not in the net propulsive state demonstrated complexes consisting only of the 8/min ejections. Segments of proximal duodenum and midjejunum failed to produce net propulsion when evaluated under similar conditions. These results indicate that 1) ileal segments can intrinsically produce net fluid transport in the aboral direction when hydrostatic work is required for propulsion, 2) propulsive activity intrinsic to ileal segments is regulated by intrinsic control mechanisms having an effective oscillatory period of 8 min, and 3) basic differences exist in the intrinsic control structures between ileal and other intestinal regions.