Q. At puberty, the adolescent female body changes in both structure and function of several organ systems, primarily under an influence of changing concentrations of estrogen and other steroid hormones. How can one hormone, such as estrogen, mediate so several effects?

a. Estrogen is kept away from the surface of any cells not able to bind it at surface.

b. Estrogen has specific receptors inside several cell types, but each cell responds in the similar way to its binding.

c. estrogen has different shaped receptors for each of numerous cell types.

d. estrogen binds to exact receptors inside many kinds of cells, each of which have different responses to its binding.

e. estrogen is produced in extremely large concentration and then diffuses widely.