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  • Title: The magnesium, calcium, sodium, potassium and chloride contents of the term human placenta.
    Author: Challier JC, Bara M, D'Athis P.
    Journal: Magnes Res; 1988 Dec; 1(3-4):141-5. PubMed ID: 3275201.
    Abstract:
    The ion content of the human term placenta was determined. When ordered decreasingly according to their placental content, the series of ions was: Na greater than Cl greater than K greater than Ca greater than Mg. These levels, plotted as a function of the tissue dry weight, showed an exponential distribution. Using Cl as an extracellular marker, Na and K cellular concentrations were evaluated. The equilibrium potentials derived from these values were very different from the measured syncytial membrane potential or from the value usually recorded in non-innervated tissues.
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