Water-soluble hormones, such as proteins and peptide hormones, activate target cells using ________.

Question

Quizplus · Accepted Answer

Water-soluble hormones cannot diffuse through the plasma membrane of target cells, so they bind to receptor proteins on the cell surface, which activate a second-messenger system inside the cell to cause a response. This type of signaling is known as the second-messenger system. Direct gene activation and steroid hormone action are strategies used by lipid-soluble hormones. Diffusion is a passive transport mechanism and not specific to hormone signaling.

Water-Soluble Hormones, Such as Proteins and Peptide Hormones, Activate Target