An unusual growth of tissue, such as an intestinal polyp, is often found by histologic analysis to be "hyperplasic" (i. e., too many cells) and benign (not cancerous), rather than cancer. which of the following features is most likely to cause this abnormal, but not necessarily cancerous, behavior?

Check all that occur during ventricular systole. a. the av valves open to allow blood to enter the ventricles from the atria. b. the av valves open to allow blood to enter the ventricles from the atria. c. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. d. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. e. the semilunar valves open to allow blood to flow into the large arteries. f. the semilunar valves open to allow blood to flow into the large arteries. g. the av valves close to prevent backflow of blood into the atria.