The concentration of an ultratrace essential element in the body is less than ________ per gram of body mass.
A)1 g
B)10 mg
C)1 mg
D)10 $\mu$g
E)1 $\mu$g

Question

Quizplus · Accepted Answer

Ultratrace elements are essential elements that are required in very small amounts. The concentration of an ultratrace element in the body is less than 1 microgram (µg) per gram of body mass. Therefore, the best choice is E, which is 1 µg per gram of body mass.

The Concentration of an Ultratrace Essential Element in the Body μ\muμ

The Concentration of an Ultratrace Essential Element in the Body $\mu$