Heart disease is the leading cause of death among both men and women in the United States. It is usually caused when a sticky substance called plaque builds up in the arteries. Often, the only symptoms of heart disease are chest pain or discomfort. Why do you think heart disease is so prevalent in the United States? How could heart disease affect other organ systems?

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.