Your cardiac surgeon warns you that they might need to install an artificial valve in your heart because blood is being regurgitated into your right ventricle. The valve
they are considering replacing is your:
aortic valve.
tricuspid valve.
mitral valve.
pulmonary semilunar valve.

Agroup of 50 adult male humans were in a clinical study to determine how much niacin is toxic. during the first two weeks of the study, members of the group consumed only a formula diet that was nutritionally complete, except it contained 24 mg niacin, which is 1.5 times the rda for niacin (males). at that point in the study, all members reported feeling fine. during the next week, they were given a formula that contained 48 mg niacin. within a few days of consuming this formula, 90% of the participants reported feeling ill, and they complained of having upset stomachs and reddened facial skin. at that point, researchers gave the subjects a formula that contain 16 mg niacin. after a week of consuming the new formula, all participants reported feeling well again. based on this information, the researchers concluded that the amdr for niacin is between 16 and 24 mg/day. ul for niacin was between 24 and 48 mg/day. human requirement for niacin is 16 mg/day. eer for niacin was 16 mg/day.

Why do we learn how to calculate the distance of a parabola in 10th grade but not what a 401k is?

Which word can describe a person's gender identity? a) female b) intersexual c) asexual d) androgynous