钾离子浓度升高对神经分泌结构内颗粒运动的影响。
Effect of increased potassium concentrations on particle motion within a neurosecretory structure.
作者信息
Englert D, Edwards C
出版信息
Proc Natl Acad Sci U S A. 1977 Dec;74(12):5759-63. doi: 10.1073/pnas.74.12.5759.
Abstract
Intensity fluctuation spectroscopy was used to detect particle motion within the pericardial organ of the crab Carcinus while it was perfused with media with increased potassium concentrations. Replacement of some or all of the sodium ions of the normal medium with potassium ions caused a graded increase in motion. Evidence is presented which indicates that this effect is not a consequence of membrane depolarization or calcium ion influx, but is due to the flux of potassium chloride and water into the cytoplasm of the cells.
摘要
在向螃蟹（Carcinus）的心包器官灌注钾离子浓度升高的培养基时，利用强度波动光谱法检测其内部的颗粒运动。用钾离子替代正常培养基中的部分或全部钠离子会导致运动逐渐增加。有证据表明，这种效应不是膜去极化或钙离子内流的结果，而是由于氯化钾和水流入细胞的细胞质所致。
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