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Question #45728
The Question
Following a severe hemorrhage, a patient experiences a massive drop in blood pressure, triggering the hyperactivation of both the Renin-Angiotensin-Aldosterone System (RAAS) and ADH secretion. Which of the following statements regarding their specific physiological roles and consequences is INCORRECT?
Options
- A.
Angiotensin II acts as a powerful vasoconstrictor and also stimulates the hypothalamus to increase ADH release from the neurohypophysis.
- B.
Aldosterone promotes the reabsorption of and excretion of in the distal tubule, whereas ADH specifically regulates facultative water reabsorption.
- C.
To rapidly restore blood volume, ADH facilitates the insertion of Aquaporin-2 channels into the epithelial cells of the proximal convoluted tubule.
- D.
Unregulated hyperactivation of RAAS primarily risks hypernatremia, whereas isolated hypersecretion of ADH leads to dilutional hyponatremia.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Angiotensin II|Aldosterone|Collecting Duct
Why This Question Is Tricky
Common Mistakes
Location Trap & Functional Specificity: Students often know that ADH increases water reabsorption but fail to pinpoint the exact anatomical site (DCT/Collecting Duct vs PCT).
Furthermore, it tests the conceptual pivot between obligatory water reabsorption (PCT, ADH-independent) and facultative water reabsorption (DCT/CT, ADH-dependent), while synthesizing the distinct ionic consequences of RAAS vs ADH.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Excretory Products and Their Elimination - Class 11 |
| Concept | ADH (Vasopressin) Logic |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |