在降低细胞内外Na~+跨膜梯度的情况下，用细胞内离子选择电极监测细胞内Na~+主动逐出速率以测量细胞膜钠泵活动。
Under condition of decreased transmembrane Na + gradient , intracellular Na + extrusion was monitored by sodium ion-selective electrodes to assess sodium pump activities .
细胞内电极