Lifestyle choices are usually an important factor in the development of heart disease.
a. true
b. false

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

Kyla injures her leg during a rock climbing accident. which type of rehabilitative care would she need after her injury has healed?

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.