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Question #46200
The Question
During severe dehydration and heat stress, a desert mammal's sympathetic nervous system induces intense vasoconstriction of the afferent renal arterioles. While this drastically reduces the Glomerular Filtration Rate (GFR) to conserve water for thermoregulation and maintain blood volume, it forces a critical physiological trade-off. Which of the following is the primary systemic consequence of prolonging this state?
Options
- A.
Collapse of the medullary interstitial gradient due to the cessation of the vasa recta's counter-current exchange.
- B.
Uremic poisoning and cellular toxicity due to the failure of obligatory nitrogenous waste excretion.
- C.
Severe metabolic alkalosis due to the inability of the distal convoluted tubule to secrete hydrogen ions.
- D.
Paradoxical diuresis caused by the over-activation of the Renin-Angiotensin-Aldosterone System (RAAS).
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Uricotelism|Water Conservation|GFR
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often view physiological adaptations (like dropping GFR to save water) as universally beneficial without recognizing the biological trade-offs.
The trap lies in understanding that while the sympathetic shutdown of the kidney saves water, it directly violates the kidney's primary function of nitrogenous waste removal, leading to uremia.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Animal Kingdom - Class 11 |
| Concept | Thermoregulation logic |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |