E5 Signal transduction

Hormones Some lipophilic hormones (e.g. the steroid hormones, thyroxine, retinoic acid and vitamin D) diffuse across the plasma membrane and interact with intracellular receptors in the cytosol or nucleus. Other lipophilic hormones (e.g. the prostaglandins) and hydrophilic hormones (e.g. the peptide hormones insulin and glucagon and the biogenic amines epinephrine and histamine) bind to receptor proteins in the plasma membrane. 

Cell-surface Cell-surface receptors are integral membrane proteins located in the plasma 

Second Intracellular signaling molecules (second messengers) are produced in 

Related topics Membrane lipids (El) Cholesterol (K5) Membrane protein and Nerve (N3) carbohydrate (E2) Control of glycogen metabolism 07) 

Cell signaling In multicellular organisms there is a need for the cells to communicate with one another in order to coordinate their growth and metabolism. The principal way by which cells communicate with each other is by means of extracellular signaling molecules or hormones. These molecules are synthesized Instant Notes in Biochemistry 2nd Edition, B.D. Hames N.M. Hooper, (c) 2000 BIOS Scientific Publishers Ltd, Oxford. 

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