People should avoid taking individual mineral supplements unless a dietary deficiency or medical condition specifically warrants it because an excess of one mineral may decrease the absorption and metabolism of other minerals. true or false?

Blood cells bring oxygen to cells and take carbon dioxide away. true or false

Ais a person who demonstrates effective communciation, self-directed learning, critical thinking, and responsible citizenship

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.