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Question #46183
The Question
An amphibian's integument is severely obstructed by an impermeable environmental pollutant, halting cutaneous gas exchange. Given that cutaneous respiration is a major route for elimination in these organisms, which of the following physiological cascades will most likely occur in its systemic capillaries?
Options
- A.
Increased diffusion of into RBCs drives carbonic anhydrase activity forward, leading to an enhanced influx of into RBCs and a rightward shift of the oxygen dissociation curve.
- B.
Accumulation of in the plasma inhibits carbonic anhydrase, causing an efflux of from the RBCs to maintain electrical neutrality, leading to respiratory alkalosis.
- C.
The resulting hypercapnia decreases the formation of , forcing out of the erythrocytes (reverse Hamburger phenomenon) to buffer the plasma pH.
- D.
Elevated plasma directly binds to plasma proteins, reducing the need for the chloride shift and causing a leftward shift of the oxygen dissociation curve.
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
Amphibian Integument | Chloride Shift (Hamburger Phenomenon) | Metabolic Flux and Steady State
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Integrating the Hamburger Phenomenon with the Bohr effect under pathological conditions.
Students often memorize the Chloride Shift but fail to apply Le Chatelier's principle to the Carbonic Anhydrase reaction during hypercapnia.
The trap tests the exact direction of movement (influx vs efflux) and the subsequent shift in the oxygen dissociation curve.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Animal Kingdom - Class 11 |
| Concept | Amphibian Integument |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |