Target cells for steroid hormones and thyroid hormones do not have membrane receptors for these hormones because they ____.
A) stimulate the cell by changes in electrical activity
B) are hydrophobic
C) enter the cell by ion channels
D) are small enough to diffuse directly into the cell
E) dissolve readily in the extracellular fluid (ECF)

Question

Quizplus · Accepted Answer

Steroid hormones and thyroid hormones are hydrophobic, allowing them to diffuse through the lipid bilayer of the cell membrane and bind to intracellular receptors.

Target Cells for Steroid Hormones and Thyroid Hormones Do Not