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Figure 1 A summary of neurohormonal mechanisms involved in sodium and water (and hence plasma volume) homeostasis. Although the figure separates the sodium and water retaining systems and the opposing natriuretic and diuretic systems, considerable interaction between the individual components occurs. ANP = atrial natriuretic peptide; BNP = brain natriuretic peptide; NO = nitric oxide; PG = vasodilatory prostaglandins.
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