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Peptide Hormone Receptors

Meaning

Peptide hormone receptors are cell surface proteins that bind to peptide hormones, such as insulin, growth hormone, or thyroid-stimulating hormone, initiating an intracellular signaling cascade. Unlike steroid hormones, peptide hormones are generally water-soluble and cannot cross the cell membrane, requiring these transmembrane receptors to transmit their signal into the cell. These receptors are crucial components of the endocrine system, mediating diverse physiological functions including metabolism, growth, and stress response.