HELP HELP HELP HELP MY PEE IS ON FIRE why does it burn when i pee my my doctor sAYS SAYS its because of all the kit kats i stick myself into HE SAYS I Might have A ST D WHAT DO I DO OW OW OW OW OW

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.