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niao lei zhi zhu ge chang zhi mi
Pages: 14-15
Year: Issue:  6
Journal: ZHONGXUE YUWEN

Abstract:  歌唱爱,才精彩 当春天来临,鸟类就从早到晚开始放声歌唱了.它们为什么如此喜爱春天呢?日本科学家研究从3.8万只日本鹌鹑身上提取的大脑样本,然后将其分别放在光线下接受时间长短不一的照射.结果发现,当鹌鹑大脑表面的细胞接受更多光照时,这些细胞内的基因被激活了,其脑垂体开始释放出一种促甲状腺素,促甲状腺素进入血液后便会刺激鸟儿分泌更多的性激素,达到一定程度后,雄鸟便产生了寻找配偶的需求,于是,它们便...
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