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Question #45739
The Question
A patient exposed to an organophosphate pesticide (a potent acetylcholinesterase inhibitor) experiences severe difficulty in normal micturition despite a full bladder. Which of the following best explains the physiological basis of this disrupted micturition reflex?
Options
- A.
Complete suppression of sensory impulses from the stretch receptors of the bladder wall.
- B.
Prolonged depolarization of the detrusor muscle causing a temporal mismatch with urethral sphincter relaxation.
- C.
Direct inhibition of the parasympathetic motor neurons within the sacral segments of the spinal cord.
- D.
Sustained contraction of the internal urethral sphincter due to sympathetic hyperactivation.
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
Neurotransmitters|Acetylcholine|Post-synaptic membrane
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often memorize the NCERT line 'CNS passes on motor messages to initiate the contraction of smooth muscles of the bladder' without integrating it with the 'Neural Control' chapter's details on synaptic transmission.
The trap lies in confusing the site of action of the chemical agent.
Organophosphates act at the synapse/neuromuscular junction by preventing ACh breakdown, not by inhibiting central motor neurons or sensory stretch receptors.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Excretory Products and Their Elimination - Class 11 |
| Concept | Micturition Reflex Control |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |