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第274章 细胞骨架 四(1 / 2)

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吴穹无辜的大眼睛一睁,忽而脸颊跟着微微泛红。“我跟滨哥说正事呢,滨哥怎么突然跟我说这个?”

杭滨脸上没多少喜色,“我对你那些女施主不感兴趣,我跟你讨论的也是正事。你细胞生物学刚刚及格,你不会是关于细胞骨架的分数全都丢了吧?”

“差不多吧。”吴穹说,“凡是问细胞骨架有什么作用的题目,我的回答都是固定支撑。不一定全对,但是至少能对一半。”

“难怪你小子没长进。”杭滨嫌弃道,“得了!哥哥我看在瞿梦凡同学的面子上,今天再给你补一次课。”

“福生无量天尊!”吴穹一把抓住杭滨的手,“有道是路遥知马力,患难见真情!杭施主大恩无以言谢,待他日贫道修成正果,贫道定当为施主封禅祭天,告慰神灵。”

“得了吧您!”杭滨一把甩开吴穹的手,“明知我命没你长,你还见天给我下降头。你那点三脚猫的功夫跳一次大神就能把我直接克死!”

吴穹眼见杭滨气消了,嬉皮笑脸又开始胡乱瞎扯:“我这不是闻道有先后,术业有专攻。滨哥是科学界难能可贵的人才。

“我则是励志在宗教领域把科学学得最好,在科学领域把人际关系搞得最好,在宗教和科学领域把娱乐业搞得最好”

=================

吃过晚饭,吴穹提心吊胆带着瞿梦凡回到细胞宿舍。

这次瞿梦凡学乖了,她不敢一进门就到处乱跑。可惜了眼前放着那么好玩的巨型蹦蹦床不能玩,她只能眼巴巴跟在吴穹身后等待吴穹发落。

吴穹看着铺天盖地的的细胞骨架,回想他第一次进到细胞里面的时候就被纷繁杂乱的绳网吓个半死。没想到两年多过去了,直到今天他依然对这些绳网十分抵触。

杭滨说,这些绳网结构是地球生物的祖先用20亿年的时间进化来的。正因为有了前期20亿年的铺垫,后面20亿年的进化历程才能展现出高度复杂的生物多样性。

俗话说,麻雀虽小五脏俱全,细胞也是一样。细胞只是因为太小了,人们用肉眼看不见里面的结构,所以觉得细胞里面只是包了一团水罢了。

从简单的逻辑推理不难知道,在生命出现最早的20亿年里,海洋中只有单细胞生物。那个时候的单细胞生物已经具备游泳的能力了,它们并不局限于跟着洋流随波逐流,必要的时候它们会寻着有食物的海域定向游动。

不仅会游泳,那时候的单细胞生物还会互相猎杀。在细胞学院里,白木天的巨噬细胞能够完美模拟这一过程。

巨噬细胞能够随时变换形态,在狭窄的地方细胞把自己压得很扁,在宽阔的地方细胞又把自己撑得很胖。巨噬细胞非常擅长爬行和游动,加上能够随意变形的身体,白木天靠着这张王牌在十二这个宿舍群里四处游动。

想要实现巨噬细胞那样的形变,细胞膜本身是做不到的。真正发挥作用的是巨噬细胞里面的细胞骨架,骨架一收缩,细胞就会变扁。骨架一舒张,细胞又会变胖。

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