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血液学答案和解释161.答:b.骨髓多能造血干细胞是粒细胞系、单核细胞系、红细胞系和巨核细胞系的前体。当其活化产生红细胞时,骨髓多能造血干细胞可分化成两种红细胞前体:裂解形成单位(BFU-E)和集落形成单位(CFU-E)。这些活化的干细胞转变成首先可以辩认的红细胞系前体——原始红细胞。原始红细胞发育成早幼红细胞。随着血红蛋白的生成逐渐转变为中幼红细胞。再下一步即为晚幼红细胞,再转变为网织红细胞。网织红细胞发育成熟为红细胞。红细胞大约有120天存活期。162.答:d.当瑞氏染色反应偏碱时,红细胞
Hematology Answers and Explanations 161. Answer: b. Bone marrow pluripotent hematopoietic stem cells are precursors of granulocyte, monocytic, erythroid, and megakaryocytic lines. Bone marrow pluripotent hematopoietic stem cells can differentiate into two red blood cell precursors when they are activated to produce erythrocytes: lytic units of formation (BFU-E) and colony forming units (CFU-E). These activated stem cells turn into the first red blood cell line precursor that can be identified - erythroid cells. The primitive erythrocytes develop into premature erythrocytes. With the formation of hemoglobin gradually transformed into meiyang cells. The next step is late red blood cells, and then into reticulocytes. Reticulocyte development is mature erythrocytes. Erythrocytes have a lifespan of about 120 days. 162. A: d. When Wright’s staining is slightly alkaline, erythrocytes