Sodium
Pump
Cells, in general, have a high intracellular concentration of K+ as compared to Na+.
The
extracellular
fluid
on
the
other
hand
is
usually
high
in
N
a+
and
low
in
K+.
Maintenance
of
these
ion
concentrations
is
ofgreat
physiological
importance.Over
one
third
of
the
ATP
requirement
of
an
average
resting
cell
is
towards
the
maintenance
the
Na+
and
K
+
gradients.
