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The presence of which hormone would NOT cause an increase in water retention?


ANP, or Atrial Natriuretic Peptide is a hormone released in response to increased blood volume and pressure that produces vasodilation. As a consequence of this vasodilation, the excretion of both sodium and water increases in order to return to the homeostatic conditions prior to increased blood volume and pressure. Because excretion of water increases, ANP causes a decrease in water retention and not an increase.

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