active transport

英 [ˈæktɪv ˈtrænspɔːt]

美 [ˈæktɪv ˈtrænspɔːrt]

主动运输（传递）；活性运转；活性转移（化学物质藉能量之力穿过集中或带电势的坡度，与正常的滤渗方向相反）

化学

英英释义

noun

• transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient

双语例句

• Characterization of Ca~ ( 2+) ATPase Which Drives Active Transport ofCa~ ( 2+) in Plasma Membrane Vesicles Isolated from Pulp Cell of Malus pumila Fruits
  苹果果肉质膜微囊主动运输Ca~（2+）的Ca~（2+）ATP酶特性
• The reason may be that in fishes, drugs are eliminated mainly through the passive diffusion by renal blood vessels and gills while in mammals, through active transport by kidney.
  原因可能是在鱼体内，药物主要通过肾脏血管和腮被动扩散消除，而哺乳动物则主要通过肾脏的主动转运消除。
• The passways of inorganic ions across the membrane have passive transport ( along the ion concentration gradient) and active transport ( inverse ion concentration gradient).
  生物膜对无机离子的跨膜运输有被动运输（顺离子浓度梯度）和主动运输（逆离子浓度梯度）两种方式。
• These experimental results suggested that Cd and Zn uptake was correlated with the energy metabolism, and may even be involved in an active transport, besides the facilitated transport.
  除了载体介导的易化转运过程外，翡翠贻贝对溶解态Cd和Zn的吸收也与机体的能量代谢相关联，涉及到需要ATP供能的主动转运过程。
• Drugs may cross a biologic barrier by passive diffusion, facilitated passive diffusion, active transport, or pinocytosis.
  主动转运或胞饮作用等方式穿越生物屏障。
• Their absorption was first-order process besides the passive diffusion mechanism, and facilitated diffusion and active transport may also take part in the transport process.
  栀子苷在大鼠小肠的吸收速率随浓度的增加而减小，提示药物的吸收机制除了被动扩散外，可能有主动转运和易化扩散因素；
• Active transport: This process is characterized by selectivity and saturability and requires energy expenditure by the cell.
  主动转运这种转运过程的特征是选择性和饱和性，需要细胞的能量消耗。
• The sodium/ iodide symporter ( NIS) is an intrinsic membrane protein that mediates the active transport of iodide into the thyroid and other tissues.
  钠／碘同向转运体（NIS）是一种真正调节甲状腺及其他组织碘转运活性的膜蛋白。
• Active transport processes have been identified for various ions, vitamins, sugars, and amino acids.
  现已确认，多种离子、维生素类、糖类和氨基酸类都采取这种主动转运方式。
• Dopamine levels wane as dopamine is taken back into cells by an active transport system.
  多巴胺通过主动传输过程转运回细胞内后，水平下降。