问题 单项选择题

人的第一种记忆是遗传记忆。性细胞中记录了一切生物的结构和活动原则,这些特性随着性细胞世代相传。遗传记忆惰性大,正是这样才保证下一代与上一代的相似,才避免了自然界各种因素的混杂。遗传记忆的信息量非常大,达1010比特,科学界认为,只要有2%的遗传因子就能保留人的结构的全部信息。那么,其余98%的遗传因子包含的是什么信息呢原来,一部分遗传因子是从人类祖先那里继承下来的,这部分因子可以说自然界赐予的。它们在通常条件下处于隐蔽地位,一旦地球发生灾难,生存条件变得与祖先经历过的相似的时候,现代人就会产生有助于自己生存的器官。第二种记忆是免疫记忆。人的血液中有着极少的富有自我牺牲精神的细胞,它们生存的时间极短,主要职能是尽量多地消灭人体的敌人。淋巴细胞对侵入血液中的细菌或者简单有毒物质做出快速反应,生成抗体,把有害物质粘住,不让它们进入其他器官。而消灭来敌的重任则落在血液中的吞噬细胞头上,这些细胞能够毫不费力地区别外来细胞,能够把它们记住并把记忆保留下来。人一旦得过麻疹或猩红热,就会获得终身免疫力。第三种记忆是神经记忆。当我们说“我的记忆不如他好”时指的就是这种记忆。它的信息量高达1111比特。目前已知的神经记忆是由几个阶段组成的。这种记忆先从知觉开始,感觉越强烈,记得越牢。神经记忆分短期的和长期的两种。短期信息只保留数分钟,这种记忆量不大,记忆时间短,而且这种记忆十分不牢靠。如果信息十分重要,那么它就可能变为长期记忆,甚至终身记忆。信息从短期记忆转变为长期记忆的过程称为突变,是位于大脑额叶深部的海马发挥了作用。

根据本文提供的信息,下列推断不正确的一项是()。

A.神经记忆是因人而异的,免疫记忆和遗传记忆是天生的

B.遗传记忆的信息量不如神经记忆的信息量大

C.遗传记忆存在于性细胞中,免疫记忆存在于血液中的某些细胞

D.免疫记忆有助于增强机体相应的抗病能力,神经记忆则应用于生活学习之中

答案

参考答案:A

单项选择题 共用题干题
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(B)

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