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钙离子是人体重要的无机离子,它不仅是骨骼的主要成分,而且还参与维持和调节许多器官、组织、细胞的正常生理功能。细胞内外钙离子浓度的相对恒定是维持机体正常功能的一个必要条件,钙离子浓度异常是引起某些疾病的生理基础。一、钙离子的一般代谢和调节人体总钙量约有1～2公斤,其中99％以上存在于骨骼中,体液和软组织约含钙10克,血液内钙仅为0.3克左右。细胞内钙含量极微,约为细胞外液钙量1％,极不均匀地分布在质膜、细胞内膜、胞质和其它细
Calcium is an important inorganic ion in the human body. It is not only the main component of bone, but also participates in maintaining and regulating the normal physiological functions of many organs, tissues and cells. Relatively constant intracellular and extracellular calcium concentration is to maintain the normal function of the body is a necessary condition, the abnormal calcium concentration is caused by some of the physiological basis of the disease. First, the general metabolism and regulation of calcium The body’s total calcium is about 1 to 2 kg, of which more than 99% exist in the bones, body fluids and soft tissue about 10 grams of calcium, blood calcium is only about 0.3 grams. Intracellular calcium content is minimal, about 1% of the amount of extracellular calcium, very unevenly distributed in the plasma membrane, cell membrane, cytoplasm and other fine