Non ACTH mediated hormones - Na+/ homeostasis - Renin-angiotensin

4 important questions on Non ACTH mediated hormones - Na+/ homeostasis - Renin-angiotensin

Where and when is renin secreted?

Granular cells within juxtaglomerular apparatus when the macula densa detects low blood pressure via low Na+

What does renin do after it is secreted?

It catalyzes a series of steps to produce angiotensin II

What does angiotensin II do after it is produced?

It travels to the zona glomerulosa and promotes aldosterone to be made
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How is renin regulated?

Blood volume and pressure (partly regulated by ADH)

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