Arrange the events of Renin – Angiotensin mechanism in correct sequence. (A) Activation of JG cell and release of renin. (B) Angiotensin II activates release of aldosterone. (C) Fall in glomerular blood pressure. (D) Reabsorption of Na+ and water from distal convoluted tubule. (E) Angiotensinogen is converted to Angiotensin I and then to Angiotensin II. Choose the correct answer from the options given below :
Answer: (C) (C), (A), (E), (B), (D). Answer: (c) (C), (A), (E), (B), (D) Solution: A fall in glomerular blood pressure (C) activates the juxtaglomerular (JG) cells to release renin (A).
- A.(A), (D), (C), (B), (E)
- B.(B), (A), (E), (D), (C)
- C.(C), (A), (E), (B), (D)✓
- D.(A), (D), (E), (C), (B)
Correct Answer
(C) (C), (A), (E), (B), (D)
Solution & Explanation
Answer: (c) (C), (A), (E), (B), (D) Solution: A fall in glomerular blood pressure (C) activates the juxtaglomerular (JG) cells to release renin (A). Renin converts angiotensinogen to angiotensin I and then angiotensin II (E), which activates the release of aldosterone (B). Aldosterone then promotes reabsorption of Na+ and water from the distal convoluted tubule (D), restoring blood pressure. NCERT Reference: Chapter 19, Page 245, Line(s) 19-22 — "Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water... Thus, aldosterone helps in the maintenance of electrolytes, body fluid volume, osmotic pressure and blood pressure."