Hormones Can Exert Their Effects Even in Very Low Concentrations

Multiple Choice

Hormones can exert their effects even in very low concentrations. For example, testosterone has many dramatic effects, even though its concentration in the blood of adult human males is about 30-100

A) deciliters per liter.
B) grams per milliliter.
C) grains per ounce.
D) millionths of a gram per milliliter.
E) billionths of a gram per milliliter.