细胞增殖
细胞增殖是指细胞生长和分裂成两个子细胞的过程[1][2][3][4]。细胞增殖使细胞数量成倍增加，因此它是组织生长的快速机制。细胞增殖要求细胞生长和细胞分裂同时发生，以使细胞的平均大小保持不变。细胞增殖与细胞生长或细胞分裂不同的是，细胞分裂时可以不发生细胞生长，这样会生成许多小细胞(如卵裂)，而细胞生长可以不发生细胞分裂，因而会产生单个较大的细胞(如神经元的生长)[5]。细胞总数由细胞增殖率减去细胞死亡率所决定。
参考
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