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Question #46005
The Question
An aquatic ecosystem experiences a massive influx of organic waste, leading to a high Biochemical Oxygen Demand (BOD) and severe depletion of Dissolved Oxygen (DO). If a mammal were subjected to a similarly severe hypoxic stress, it would attempt to maintain homeostasis by maximizing its pulmonary ventilation. During this state of maximal forced breathing, which of the following statements regarding its respiratory volumes and capacities is INCORRECT?
Options
- A.
The maximum volume of air the mammal can exchange in a single breath is its Vital Capacity, which equals Total Lung Capacity minus Residual Volume.
- B.
To maximize oxygen uptake, the mammal will completely expel its Functional Residual Capacity (FRC) before initiating a maximal inspiration.
- C.
The volume of air remaining in the lungs after the maximal forced expiration cannot be measured by a standard clinical spirometer.
- D.
The additional volume of air inspired above the normal tidal volume to combat the hypoxic stress represents the Inspiratory Reserve Volume (IRV).
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
Inspiratory Reserve Volume|Vital Capacity|Aquatic Ecosystem
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often confuse the components of respiratory capacities.
The trap relies on the misconception that 'maximal expiration' empties the lungs entirely.
By stating the mammal completely expels its FRC, it tests the student's knowledge that FRC includes Residual Volume (RV), which is anatomically impossible to expel.
It elegantly bridges Class 12 environmental stress (BOD/DO) with Class 11 respiratory mechanics.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Breathing and Exchange of Gases - Class 11 |
| Concept | Respiratory Volume vs. Capacity |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |