Which of the following statements best describes the actions of thyroid hormones?
A) These hormones interact with membrane signaling proteins.
B) Thyroid hormones bind to molecules of the cytoskeleton in the cell cytoplasm.
C) Thyroid hormones bind to epithelial plasma membranes that line the intestine.
D) Both "These hormones interact with membrane signaling proteins" and "Thyroid hormones bind to epithelial plasma membranes that line the intestine" are correct.

Question

Quizplus · Accepted Answer

Thyroid hormones primarily act by entering cells and binding to intracellular nuclear receptors, which then modulate gene expression. They do not primarily interact with membrane signaling proteins or bind to molecules of the cytoskeleton or epithelial plasma membranes in the manner described in the other options.

Which of the Following Statements Best Describes the Actions of Thyroid