Performing activities that improve cardiovascular fitness will decrease your risk of heart disease. T.
True

F.
False

Which method will provide the most emotional support in a new exercise program

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.

Which of the following mental illness does not begin during adolescence? a. post-traumatic stress disorder b. obsessive-compulsive disorder. c. schizophrenia. d. addictions