What is the rate-limiting (regulated) step for stimulating the secretion of aldosterone?

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The rate-limiting step for stimulating the secretion of aldosterone is the conversion of angiotensinogen to angiotensin I in the blood. This occurs when renin is released by the kidneys in response to low blood pressure. Angiotensin I is then converted to angiotensin II in the lungs and other tissues, which stimulates the secretion of aldosterone from the adrenal glands. While other steps in this pathway are important, the conversion of angiotensinogen to angiotensin I is the step that is most tightly regulated and determines the rate of aldosterone secretion.

What Is the Rate-Limiting (Regulated) Step for Stimulating the Secretion