How are progression and variation similar?
a. both state that changes in a routine are necessary for consistent gains.
b. both state that using a repetitive routine is necessary for best gains.
c. both represent major components of the fitt principle.
d. both are primarily used as injury-prevention methods.

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.

Explain different ways infections from different organisms can be treated.

List the benefits of vitamin c and vitamin b