At puberty, an adolescent female body changes in both structure and function of several organ systems, primarily under the influence of changing concentrations of estrogen and other steroid hormones. How can one hormone, such as estrogen, mediate so many effects?
a. Estrogen is kept away from the surface of any cells not able to bind it at the surface.
b. Estrogen has specific receptors inside several cell types, but each cell responds in the same way to its binding.
c. estrogen has different shaped receptors for each of several cell types.
d. estrogen binds to specific receptors inside many kinds of cells, each of which have different responses to its binding.
e. estrogen is produced in very large concentration and therefore diffuses widely.