Distribution of lons Across plasma Membranes of a human skeletal muscle cell EN =+65 mV E1=-90mV Na+ =145 mM C|-=115mM Na+=12 mM Cl-=3.6 mM K+=160mM ++++十 90 mV (resting membrane potential K+=3.5mM 100mVDistribution of Ions Across Plasma Membranes of a human skeletal muscle cell