The 'Hormone Angiotensin II' is a potent vasoconstrictor. It also stimulates the adrenal cortex to secrete:
A. Cortisol
B. Noradrenaline
C. Adrenaline
D. Aldosterone
Answer: Option D
Solution (By JKExamLibrary)
Angiotensin II is a powerful octapeptide hormone formed in the blood by the action of angiotensin-converting enzyme (ACE). It has multiple effects to increase blood pressure and volume. It is a potent vasoconstrictor, increasing systemic vascular resistance. Crucially, it also acts on the zona glomerulosa of the adrenal cortex to stimulate the secretion of the mineralocorticoid hormone aldosterone. Aldosterone then acts on the kidneys to increase sodium and water reabsorption, further increasing blood volume and pressure.
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