Tear glands excrete a salty solution through a bulk-movement process called? a) endocytosis
b) pinocytosis
c) phagocytosis
d) exocytosis

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.