Which of the following describes the correct use of a tympanic
thermometer?
O Use plastic covers to prevent the spread of infection.
O Sterilize the thermometer in disinfectant after each use.
O Read the temperature after 60 seconds.
O Place just the tip of the thermometer inside the ear canal.

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.