The reason that the steroid hormone aldosterone affects only a small number of cells in the body is that
A) only its target cells get exposed to aldosterone.
B) only its target cells contain aldosterone receptors.
C) it is unable to enter nontarget cells.
D) nontarget cells destroy aldosterone before it can produce any effect.
E) nontarget cells convert aldosterone to a hormone to which they do respond.

Question

Quizplus · Accepted Answer

Aldosterone affects only its target cells because only those cells contain aldosterone receptors, which allow the hormone to bind and produce its effects. Other cells do not have the necessary receptors, so they do not respond to aldosterone.

The Reason That the Steroid Hormone Aldosterone Affects Only a Small