in nerve and muscle 10µsec: in red blood cell 100sec
||OS. Andersen, "Cellular Electrolyte Metabolism", in Encyclopedia of metalloproteins, eds. Robert H Kretsinger Vladimir N Uversky E A Permi?a?kov, Springer 2013 pp.580-587 p.585 left column 3rd paragraph
||"Gm varies between 0.1S/cm^2 (in nerve and muscle, where rapid potential changes are critical) and 10^-8S/cm^2 (red blood cells), meaning that t (Cm/Gm)=(membrane capacitance)/(membrane conductance) varies between 10µs and 100s."