If there is any dehydration, bleeding, or blood pressure drop, it is detected by the blood pressure receptors or baroreceptors in the aorta. When the risk is detected by the blood pressure receptors, they signal the brainstem that leads to different remedial sympathetic reflexes. One of the remedial measure is secretion of the enzyme called renin by the granular cells. This renin enzyme in turn has an action over angiotensin.

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Chapter 23, Problem 7WWTS

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If there is any dehydration, bleeding, or blood pressure drop, it is detected by the blood pressure receptors or baroreceptors in the aorta. When the risk is detected by the blood pressure receptors, they signal the brainstem that leads to different remedial sympathetic reflexes. One of the remedial measure is secretion of the enzyme called renin by the granular cells. This renin enzyme in turn has an action over angiotensin.

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