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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Polar capsule ： ウィキペディア英語版 Polar capsule Polar capsules are structures found in the valves of Myxosporean parasites, which contain the polar filament. The polar capsule is constructed of a proteinaceous and a polysaccharide layer, both layers of which continue into the polar filament. The mouth of the capsule is covered with a cap-like structure. This structure may function as a stopper, its digestion in the alimentary tract possibly triggering the discharge of the polar filaments. Two ideas have been proposed to explain the eversion of the polar filaments. Firstly, that the hydrostatic pressure in the polar capsule pushes the filament out, rather like the cnidocyst of coelenterates. The second is that extrusion is an active process involving contractile proteins and is calcium-dependent (Uspenskaya, 1982). ==References== * Uspenskaya, A.V. (1984). ''Cytology of myxosporidia''. Nauka, Leningrad. 122pp. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Polar capsule」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.