The half-life of a hormone allows one to determine

A) the rate of hormone secretion.
B) the identity of a hormone.
C) the rate at which hormones are eliminated from the body.
D) the rate of action of a hormone.
E) the rate of travel through the blood to a target.

The half-life of a hormone is a measure of the time it takes for half of the hormone to be eliminated from the body. This concept is directly related to the rate at which hormones are metabolized or excreted, rather than their secretion rate, identity, action mechanism, or travel speed through the blood.