翻訳と辞書 Words near each other ・ Sperm bank ・ Sperm Bluff ・ Sperm chemotaxis ・ Sperm competition ・ Sperm donation ・ Sperm donation laws by country ・ Sperm granuloma ・ Sperm guidance ・ Sperm heteromorphism ・ Sperm motility ・ Sperm oil ・ Sperm precedence ・ Sperm protein associated with the nucleus, X-linked, family member A1 ・ Sperm sorting ・ Sperm theft ・ Sperm thermotaxis ・ Sperm Wars ・ Sperm washing ・ Sperm whale ・ Sperm whaling ・ Sperm-mediated gene transfer ・ Spermaceti ・ Spermaceti organ ・ Spermacoce ・ Spermacoce alata ・ Spermacoce brachysepala ・ Spermacoce glabra ・ Spermacoce keyensis ・ Spermacoce neoterminalis ・ Spermacoce ovalifolia Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Sperm thermotaxis ： ウィキペディア英語版 Sperm thermotaxis Sperm thermotaxis is a form of sperm guidance, in which sperm cells (spermatozoa) actively change their swimming direction according to a temperature gradient, swimming up the gradient. Thus far this process has been discovered in mammals only. == Background == The discovery of mammalian sperm chemotaxis and the realization that it can guide spermatozoa for short distances only〔Bahat, A., Tur-Kaspa, I., Gakamsky, A., Giojalas, L. C., Breitbart, H. and Eisenbach, M. (2003) ''Thermotaxis of mammalian sperm cells: A potential navigation mechanism in the female genital tract.'' Nature Med. 9, 149-150.〕 (estimated at the order of millimeters),〔Pérez-Cerezales, S., Boryshpolets, S. and Eisenbach, M. (2015) ''Behavioral mechanisms of mammalian sperm guidance''. Asian J. Androl. 17, 628-632.〕 triggered a search for potential long-range guidance mechanisms. The findings that, at least in rabbits〔David A, Vilensky A, Nathan H. (1972) ''Temperature changes in the different parts of the rabbit's oviduct''. Int. J. Gynaec. Obstet. 10, 52-56.〕 and pigs,〔Hunter RH, Nichol R. (1986) ''A preovulatory temperature gradient between the isthmus and ampulla of pig oviducts during the phase of sperm storage''. J. Reprod. Fertil. 77, 599-606.〕 a temperature difference exists within the oviduct, and that this temperature difference is established at ovulation in rabbits due to a temperature drop in the oviduct near the junction with the uterus, creating a temperature gradient between the sperm storage site and the fertilization site in the oviduct,〔Bahat, A., Eisenbach, M. and Tur-Kaspa, I. (2005) ''Periovulatory increase in temperature difference within the rabbit oviduct''. Hum. Reprod. 20, 2118-2121.〕 led to investigation whether mammalian spermatozoa can respond to a temperature gradient by thermotaxis. 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「Sperm thermotaxis」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.