illustrate the difference between the mechanism of action of protein and a steroid hormones ?
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Aug 24
Protein hormones and steroid hormones have different mechanisms of action in the body.
Protein hormones: - Protein hormones are made up of amino acids and are water-soluble. - They bind to specific receptors on the cell membrane of target cells. - This binding triggers a series of intracellular signaling cascades that ultimately lead to a cellular response. - The response is usually rapid and short-lived.
Steroid hormones: - Steroid hormones are derived from cholesterol and are lipid-soluble. - They can pass through the cell membrane and bind to intracellular receptors in the cytoplasm or nucleus of target cells. - The hormone-receptor complex then enters the nucleus and binds to specific DNA sequences, regulating gene expression. - This leads to the production of new proteins that mediate the hormone's effects. - The response to steroid hormones is usually slower but longer-lasting compared to protein hormones.
In summary, protein hormones act on cell surface receptors and trigger rapid signaling cascades, while steroid hormones act on intracellular receptors and regulate gene expression to produce a slower but longer-lasting response.