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为了对细胞为什么不能无限生长的原因有更形象的认识,可将不同大小的正方体熟石灰块放入墨水中,观察墨水扩散进入石灰块的深度,探讨细胞大小与物质运输效率的关系,同时不妨用课堂演示粉笔在水中下沉的现象来模拟细胞大小与物质运输的关系。
In order to have a more vivid understanding of why cells can not grow indefinitely, different sizes of cube-shaped slabs of lime can be placed in the ink to observe the depth of diffusion of the ink into the slab to explore the relationship between cell size and material transport efficiency Classroom demonstrates the phenomenon of chalk sinking in water to simulate the relationship between cell size and material transport.