An example of an aerobic exercise

a)
running a marathon

b)
sprinting

c)
long distance swimming

d)
a and c

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 is the best description of health protecion the answer is b the direct actions taken by health organizations to improve public health

During polarizacion potassium has a blank charge sodium has a blank charge and calcium has a blank charge