The steroid hormone aldosterone affects only a small number of cells in the body because
A)only its target cells are exposed to aldosterone.
B)only its target cells contain aldosterone receptors.
C)aldosterone can only cross the cell membrane of target cells.
D)aldosterone is only soluble in target cells.

Question

Quizplus · Accepted Answer

Aldosterone affects only its target cells because only these cells possess aldosterone receptors. In the absence of these receptors, the hormone cannot enter the cell or elicit a response.

The Steroid Hormone Aldosterone Affects Only a Small Number of Cells