pubmed-article:8155483 | pubmed:abstractText | The effects of magnesium ions were studied in human placental chorionic vessel smooth muscle cells (from arteries and veins), particularly on the membrane potential Um. Um was classically recorded with microelectrodes. Magnesium ions, in the range 1-10 mM, depolarize the membrane of the smooth muscle cells (the effect is more important in arteries than in veins). Magnesium ions influence the membrane potential directly and regulate the viability of the K+ channels. | lld:pubmed |