Antidiuretic hormone exerts its effect via a cAMP second messenger system.

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Antidiuretic hormone (ADH), also known as vasopressin, exerts its effect by binding to receptors on the cells of the kidney tubules, which leads to the activation of the cAMP (cyclic adenosine monophosphate) second messenger system. This results in the insertion of water channels into the membranes of the kidney tubules, allowing water reabsorption and thus concentrating the urine.

Antidiuretic Hormone Exerts Its Effect Via a CAMP Second Messenger