[问题1答案]:b [注解]红细胞生成受促红细胞生成素的控制。红细胞的母细胞有核称为幼稚红细胞,进而其前身细胞是具有可分化成各种血细胞能力的干细胞。干细胞有同组织移植分裂能力,分裂后仍能生成和原来相同的细胞,但组织缺氧可成为刺激,使肾脏的促红细胞生成素增高,进而刺激干细胞,由于促进原始幼稚红细胞的分化过程,使红细胞单位(幼红细胞和红细 [Answer to question 1]: b [Note] Erythropoiesis is controlled by erythropoietin. The nuclei of erythrocytes are called naïve erythrocytes, and their precursors are stem cells that have the capacity to differentiate into various blood cells. Stem cells have the ability to divide and resect with the same tissue and still produce the same cells as the original cells after division. However, hypoxia can become an irritant and increase the renal erythropoietin, which in turn stimulates the stem cells. As a result of promoting the differentiation process of naive erythrocytes, Erythrocyte units (erythroblasts and red flesh