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Question #47389
The Question
A congenital condition known as Spina Bifida arises when a specific portion of the developing vertebral column fails to fuse dorsally. Which of the following correctly identifies the anatomical structure involved and the direct physiological consequence of this defect on neural pathways?
Options
- A.
Centrum; Herniation of the spinal cord leading to the loss of cranial nerve reflexes.
- B.
Neural arch; Compression of spinal nerve roots resulting in increased reflex arc latency.
- C.
Transverse process; Disruption of the dorsal root ganglion causing exclusively motor deficits.
- D.
Intervertebral disc; Demyelination of the spinal cord tracts leading to impaired saltatory conduction.
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
Vertebral Column Formula|Reflex Arc Latency
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often memorize 'Spina Bifida = neural tube defect' but fail to connect it to the specific skeletal structure (neural arch) mentioned in NCERT Locomotion and Movement, and its functional consequence on the reflex arc (Neural Control).
The trap lies in confusing the dorsal neural arch with the ventral centrum or lateral processes, and linking spinal defects to cranial nerves.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Locomotion and Movement - Class 11 |
| Concept | Vertebral Column Formula |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |