The concentration of potassium is higher in red
blood cells than in the surrounding blood plasma.
this higher concentration is maintained by the
process of
(1) circulation (3) excretion
(2) diffusion (4) active transport

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.