The magnesium, calcium, sodium, potassium and chloride contents of the term human placenta
Challier, J.C.; Bara, M.; D'Athis, P.
Magnesium Research 1(3-4): 141-145
1988
ISSN/ISBN: 0953-1424 PMID: 3275201 Document Number: 306914
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.