apical plate 中文意思是什麼

apical plate 解釋
頂板
  • apical : adj. 1. 頂點的，頂端的。2. 【語言學】用舌尖發音的。n. 舌尖音〈如 t, d, s, l 等〉。
  • plate : n 1 厚金屬板 〈cf sheet〉 板（片）；（記有姓名等的金屬）牌子，（尤指醫生的）招牌，藏書牌；【印刷...
  1. At the beginning, the cytoplasm is evently distributed, then it is polar - distribution and at last it only remains between the apical cap and the sperm nucleus. during the period of spermatogonium, chromatin in the nucleus is in the shape of conglomeration and the nucleus is big ( i. e. the proportion of the nucleus to cytoplasm is bigger than spermatocyte ). at the stage of primary spermatocyte, chromatin accumulates to sc complexity. the nucleus of the mature sperm takes the shape of a plate and filmentous chromatins exist freely in uncondensed nucleus

    精子發生過程中，細胞器由少到多，到最後解體；細胞質從均勻分佈，到精細胞期極性分佈，最後殘留于成熟精子的頂帽和精核之間；細胞核在精原細胞期，染色質異固縮，胞核大，即核質比大於后續的精母細胞；在初級精母細胞中，染色質凝聚為sc復合體，到成熟精子，精核呈碟狀，染色質呈絲狀游離于非濃縮的核中。
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