答:铁与锌都是人体必需的微量元素,它们对人体的生长发育和维持正常的生理活动方面都有重要的作用。据有关部门统计,铁缺乏症患者多伴有缺锌。这是为什么? 大家都知道,铁与锌的吸收部位主要是在十二指肠及小肠后端。人体内的锌约60%存在于肌肉,30%存在于骨骼(后者不易入血)。血液中的锌则80%存在于红细胞膜的碳酸酐酶中,锌的排泄主要是通过大小便和汗液。人体缺乏铁可造成组织细胞内的生化改变,使一些含铁酶和铁依赖酶的合成减少或活性降低,红细胞表面积缩小,使部分红细胞结合锌相对过剩,血液中的游离 A: Iron and zinc are essential trace elements of the human body, they have an important role in the human body’s growth and development and maintain normal physiological activity. According to the relevant department statistics, many patients with iron deficiency deficiency accompanied by zinc deficiency. This is why? As we all know, iron and zinc absorption site mainly in the duodenum and small intestine back. About 60% of zinc in the human body is present in the muscles and 30% in the bones (the latter is not readily infiltrated). Zinc in the blood is present in about 80% of the carbonic anhydrase in the erythrocyte membrane, and the excretion of zinc is mainly through urine and sweat. Lack of human iron can cause biochemical changes within the cells, so that some iron-containing enzymes and iron-dependent enzyme synthesis decreased or decreased activity, reduced red blood cell surface area, so that some red blood cells combined with zinc relative surplus of free blood