1、 单纯扩散(simple diffusion or passive diffusion)被输送的物质, 靠细胞内外浓度为动力, 以透析或扩散第四节 营养物质进入细胞的方式的形式从高浓度区向低浓度区的扩散。特点:①扩散是非特异性的营养物质吸收方式: 如营养物质通过细胞膜中的含水小孔, 由高浓度的胞外环境向低浓度的胞内扩散;...
名词:被动运输、主动运输、简单扩散、协助扩散、钠钾泵、协同转运、胞吞作用、胞吐作用 被动运输(passive transport):不消耗化学能,被运输物质顺着浓度梯度越过膜到达低浓度区域,不消耗生物能。 简单扩散(simple diffusion):无膜载体参与;不消耗能;运输速率与膜两侧浓度成正比,还与他们在水相与油相中...
1、单纯扩散(simple diffusion or passive diffusion) 被输送的物质,靠细胞内外浓度为动力,以透析或扩散 的形式从高浓度区向低浓度区的扩散。 特点: ①扩散是非特异性的营养物质吸收方式:如营养物质通过细 胞膜中的含水小孔,由高浓度的胞外环境向低浓度的胞内扩 散; 第四节 营养物质进入细胞的方式 ②...
Diffusion is the movement of a molecule down a concentration gradient, from an area of its high concentration to an area of its low concentration. This process ispassive, i.e. it requires no input of additional energy; the concentration gradient alone is enough to drive the process. ...
Simple Diffusion is a type of Active Transport. A. True B. False Correct Answer B. False Explanation Simple diffusion is actually a type of passive transport, not active transport. In simple diffusion, molecules move from an area of higher concentration to an area of lower concentration without...
Simple passive scalar advection-diffusion model, Phys - Wunsch - 1998 () Citation Context ...sual” Brownian motion matching the result of [17] for rapidly decayng correlations. Anomalous diffusive behavior of passive scalars has been studied extensively in the physics literature – we mention =...
Classically it has been considered that melatonin enters freely into most of cells by passive diffusion through the cell membrane; however, there are few studies examining how melatonin is taken up by cancer cells. The aim of the present paper was to study the uptake of melatonin into human ...
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The functional, impermeable layer was adherent to the high porosity PDMS as a vertical gas/liquid barrier that lowered the diffusion of solution. In comparison to the necessity of each functional process or layer, different methods, including the MF-LAMP method (with both oil enclosure and the ...
Methods: We assessed a sample of healthy adolescents and those with psychosis using both laboratory based and real- life based decision making measures, as well as the MATRICS Consensus Cognitive battery and neuroimaging assessments including resting state fMRI and diffusion tensor imaging (DTI). Real...