Renin acts on a protein circulating in the plasma called angiotensinogen, cleaving this substance into angiotensin I. Renin is secreted from the kidneys in response to variations in blood pressure and volume and plasma sodium and potassium levels. Production of aldosterone (in adult humans, about 20–200 micrograms per day) in the zona glomerulosa of the adrenal cortex is regulated by the renin-angiotensin system. Pathways in the biosynthesis of steroid hormonesĪldosterone is synthesized in the body from corticosterone, a steroid derived from cholesterol. SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.Britannica Beyond We’ve created a new place where questions are at the center of learning.

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Hormone secreted by adrenal gland