Which of the following is characteristic of a steroid hormone action?
A) protein phosphorylation
B) cell-surface receptor binding
C) internal receptor binding
D) second messenger activation

Question

Quizplus · Accepted Answer

Steroid hormones are lipids that can easily cross the cell membrane and interact with internal receptors found in the cytoplasm or nucleus. Upon binding, these receptors directly affect gene expression and protein synthesis. This is in contrast to other signaling molecules, such as peptide hormones, which typically bind to cell surface receptors and activate second messenger systems to elicit a response. Therefore, internal receptor binding is characteristic of steroid hormone action.

Which of the Following Is Characteristic of a Steroid Hormone