Which of the following hormone types does not require membrane receptors to invoke cell responses?
A) peptides
B) catecholamines
C) steroids
D) thyroid hormone
E) both (c) and (d) above.

Question

Quizplus · Accepted Answer

Steroids and thyroid hormone diffuse through the cell membrane and bind to intracellular receptors. Therefore, they do not require membrane receptors to invoke cell responses. Peptides and catecholamines, on the other hand, require membrane receptors to initiate cell signaling pathways.

Which of the Following Hormone Types Does Not Require Membrane