一个细胞中有几个线粒体

一个细胞中有几个线粒体

 最佳答案：

      线粒体存在于大多数细胞中，是细胞有氧呼吸的场所，是细胞的能量工厂。

      不同的生物、不同的组织，细胞中线粒体的数量差异巨大。一般来说，线粒体的数量取决于细胞的能量代谢水平。能量代谢水平越高，线粒体的数量也越多。例如肝脏细胞中线粒体非常多，数量为1000一2000个，而酵母菌细胞中只有几个，有的甚至只有一个。而一般情况下，真核生物细胞中线粒体的数量在几十到几百个之间。同时，线粒体数量也不是一成不变的，也会随着细胞代谢活跃程度增减。

一粒细胞有多少线粒体

      不同生物的不同组织中线粒体数量差异很大。一个细胞内线粒体数量和细胞的代谢水平有关系。代谢活动越旺盛的细胞，线粒体数量越多。

      线粒体数量的多少取决于这个细胞需要多少能量。肌肉要消耗许多能量。因此人的一个肌肉细胞含有数千个线粒体——随着运动的增加，线粒体的数量也会增加。相反，人的皮肤不需要太多能量，所以皮肤细胞中可能只有几个线粒体。

一粒细胞有多少线粒体

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一粒细胞有多少线粒体

      一个粒细胞中的线粒体数量可以有很大差异，具体取决于粒细胞的类型和细胞的代谢水平。一般来说，代谢活动越旺盛的细胞，线粒体数量越多。例如，一个肝实质细胞可以含有2000多个线粒体，而人的皮肤细胞中可能只有几个线粒体。

      线粒体的数量还可以受到细胞年龄和环境因素的影响。随着细胞的衰老，线粒体的数量可能会减少。而在某些病理条件下，线粒体的数量也可能发生变化。

      要准确知道一粒细胞中的线粒体数量，需要更具体的细胞类型和条件信息。

线粒体叶绿体一个细胞里只有一个吗？一个细胞是不是有了叶绿体就一定有线粒体呢？

      答：前一句不对，后一句对。

      解析：真核生物细胞中有线粒体，拫据其功能的不同，线粒体的多少也不同。比如：心肌细胞的线粒体比腹肌细胞的线粒体多，因为其新陈代谢旺盛。植物细胞中的叶肉细胞才有叶绿体，其它植物细胞没有叶绿体。如绿色的叶片内，幼嫩的、绿色的树皮上有少量的叶绿体。

      一个细胞有叶绿体就一定有线粒体。

人和植物 动物的细胞中都含有线粒体吗？

      参考wiki百科的解释：线粒体在细胞生物学中是存在于大多数真核生物(包括植物、动物、真菌和原生生物)细胞中的细胞器。一些细胞，如原生生物锥体虫中，只有一个大的线粒体，但通常一个细胞中有成百上千个。

      换句话说：真核生物几乎都有线粒体，原核生物几乎都没有线粒体。生物学就是模棱两可的，它不把定义说绝了。当然高中教材认为真核生物都有线粒体，原核生物都没有线粒体。上面提到的原生生物是单细胞真核生物。

      原核生物没有成型的细胞核，有核糖体，可能有中心体，无其它细胞器。但是也可以通过不需要线粒体的特殊呼吸作用提供能量。只要有呼吸作用对应的酶，生物就可以经过呼吸作用产生能量。相对于原核生物高等一些的真核生物，才在呼吸酶的基础上进化出了更加有效率的线粒体。

      供能方式多种多样，好像只有有氧呼吸需要线粒体。其它的呼吸作用还有：无氧呼吸和光呼吸。脂类和氨基酸在糖类供能不足的情况下，也可以先转化成可利用糖类再供能。