RAAS secretes

Options

A. Glucocorticoids
B. Mineralocorticoids
C. Both A and B
D. None of the above

Answer

**Step-by-Step Solution:**

1. **Understanding RAAS**: The Renin-Angiotensin-Aldosterone System (RAAS) is a hormone system that plays a crucial role in regulating blood pressure and fluid balance in the body.

2. **Role of Renin**: When blood pressure drops, specialized cells in the kidneys called juxtaglomerular (JG) cells release an enzyme called renin.

3. **Conversion of Angiotensinogen**: Renin converts angiotensinogen, which is a protein produced by the liver, into angiotensin I.

4. **Formation of Angiotensin II**: Angiotensin I is then converted into angiotensin II by the action of the angiotensin-converting enzyme (ACE), primarily in the lungs.

5. **Function of Angiotensin II**: Angiotensin II has multiple effects, including acting as a potent vasoconstrictor, which increases blood pressure. It also stimulates the secretion of aldosterone from the adrenal glands.

6. **Aldosterone's Role**: Aldosterone is a type of mineralocorticoid hormone. It promotes the reabsorption of sodium and water in the kidneys, which helps to increase blood volume and, consequently, blood pressure.

7. **Conclusion**: Since RAAS is primarily associated with the secretion of aldosterone, which is a mineralocorticoid, the correct answer to the question is "mineralocorticoids."

**Final Answer**: The RAAS secretes mineralocorticoids.

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