动物界11大“瘾君子”:果蝇酒后变成同性恋(4)
2009-06-29 09:51:11
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树鼩喝酒不醉
生活在马来西亚山脉地区的笔尾树鼩时常喜欢吃玻淡棕榈(bertam palm)的花蜜,据悉,这种植物花蜜包含着3.8%的酒精成份,这相当于树鼩在喝啤酒。
树鼩被认为与所有现在灵长类动物的最晚近共同祖先非常相似,也就是说它是人类的一种远亲物种,但它与所有灵长目动物显著不同的是,它们体内能够很快新陈代谢酒精。研究人员曾用无线电标记跟踪了树鼩的活动状况,并估计了它们的酒精摄入量,依据人类醉酒的标准,树鼩每天晚上都有36%的醉酒可能性,但是它们却处于非常清醒的状态。经研究人员分析树鼩能够很快地将多数酒精代谢生成一种叫做乙荃葡糖苷酸(EtG)的副产物,这些物质能够安全地储存于树鼩的皮毛之下。
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