A researcher proposes to conduct a survey about sexual attitudes, beliefs, and practices. The survey will be mailed out by an HIV/AIDS prevention group to people randomly selected from a commercial mailing list. What potential harms that participants can face?

Wich technque is not recommended for use as a supporting detail

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.

Second hand smoke can be almost as harmful as smoking. true or false?