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Ca~(++)在生物活动过程中的作用早为人知,细胞内Ca~(++)浓度增高可引起多种细胞膜通透性改变,发生一系列细胞化学反应。细胞膜能相对地阻止阳离子如Ca~(++)的渗入,维持细胞内外Ca~(++)浓度差,当其发生病变时,Ca~(++)即能从细胞外进入细胞内。Ca~(++)
The role of Ca ~ (++) in biological processes was well known. The increase of intracellular Ca ~ (++) concentration caused a variety of cell membrane permeability changes and a series of cytochemical reactions. The cell membrane can relatively prevent the infiltration of cations such as Ca ~ (++) and maintain the concentration difference of Ca ~ (++) in and outside the cell. Ca ~ (++) can enter the cell from outside the cell when it is diseased. Ca ~ (++)