…The transport system of sugars and amino acids in bacteria depends on the electrochemical potential difference of H + , ⊿μH + , while reabsorption in the epithelial cells of the small intestine and the kidney depends on the gradient of Na + , ⊿μNa + , and can absorb nutrients almost completely. Transport in this way, in which the movement of one substance is accompanied by the movement of another substance (ion), is called cotransport. All active transport is an uphill reaction, so it is only possible when other energy sources are provided. … *Some of the terminology that mentions "cotransport" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…細菌の糖やアミノ酸の輸送系はH+の電気化学的ポテンシャル差⊿μH+,小腸の上皮細胞や腎臓における再吸収などはNa+のこう配⊿μNa+に依存して,栄養物質をほとんど完全に吸収することができる。このようにある物質の移動に他の物質(イオン)の移動を伴う輸送を共輸送cotransportと呼ぶ。 能動輸送はいずれも上り坂uphill反応であるから他のエネルギーの供与があって初めて可能となる。… ※「cotransport」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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