具有主动泵送的膜管：水分运输、液泡形成与渗透调节
Membrane tubes with active pumping: water transport, vacuole formation and osmoregulation
AI总结：
受原生动物伸缩泡复合体启发，本文提出一种具有单向离子泵和被动通道的主动膜管模型，通过渗透驱动水流形成大液泡以主动排出细胞内水分，为生物体渗透调节提供了一种可能的最小方法。
摘要：
生物体在淡水环境中调节体积和渗透压的需求，是许多细菌、原生动物和藻类面临的基本物理挑战。受许多原生动物中发现的伸缩泡复合体启发，我们讨论了主动膜管的简单模型如何为这类系统的流体和主动离子运输特性提供见解。我们证明，一个具有单向离子泵以及被动离子和水通道的简单膜管，会由于渗透驱动的水流形成大液泡，这可用于主动将水泵出细胞内部。我们讨论了将该系统作为渗透调节的一种可能的最小方法。
英文摘要：
The need for organisms to regulate their volume and osmolarity when surrounded by freshwater is a basic physical challenge for many bacteria, protists and algae. Taking inspiration from the contractile vacuole complex found in many protists, we discuss how simple models of active membrane tubes can give insights into the fluid and active ionic transport properties of such systems. We show that a simple membrane tube with unidirectional ion pumps, and passive ion and water channels, forms a large vacuole due to osmotically-driven water flow and that this can be used to actively pump water out of the cell interior. We discuss the use of this system as a possible minimal method for osmoregulation.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
