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===Introduction===
===Introduction===
[[Image:aldosterone.png|right|thumb|250px Benjah 2006 Aldosterone 2D structure.]]
Aldosterone is a '''steroid hormone''' which is secreted from the '''zona glomerulosa''' of the adrenal gland. It has a mineralocorticoid activity and is the most important regulator of plasma potassium. When plasma potassium increases, increased stimulation of aldosterone occurs directly and also as a result of the [[Renin Angiotensin Aldosterone System|Renin-Angiotensin-Aldosterone System (RAAS)]]. Aldosterone is also the most important regulator of sodium excretion.
Aldosterone is a '''steroid hormone''' which is secreted from the '''zona glomerulosa''' of the adrenal gland. It has a mineralocorticoid activity and is the most important regulator of plasma potassium. When plasma potassium increases, increased stimulation of aldosterone occurs directly and also as a result of the [[Renin Angiotensin Aldosterone System|Renin-Angiotensin-Aldosterone System (RAAS)]]. Aldosterone is also the most important regulator of sodium excretion.