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Question #47398
The Question
A patient presents with an altered gait and structural deformation in the pelvic region. Laboratory reports reveal chronic hypercalcemia and elevated levels of a specific hypercalcemic peptide hormone. Which of the following accurately describes the cellular mechanism induced by this hormone and the specific anatomical pivot point most vulnerable to biomechanical failure in this condition?
Options
- A.
Upregulation of osteoblasts leading to hyperostosis; weakening of the glenoid cavity.
- B.
Chronic activation of osteoclasts leading to bone resorption; demineralization of the acetabulum.
- C.
Decreased renal reabsorption of calcium ions; weakening of the pubic symphysis.
- D.
Inhibition of osteoclasts leading to decreased bone turnover; structural failure of the obturator foramen.
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
Appendicular Girdle|Calcium Homeostasis|Osteoclasts
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Integrating endocrine pathology (PTH-mediated osteoclast activation) with skeletal biomechanics (acetabulum as the primary weight-bearing articulation point).
The trap relies on functional confusion between osteoblasts/osteoclasts and location traps between the appendicular cavities (glenoid vs. acetabulum).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Locomotion and Movement - Class 11 |
| Concept | Appendicular Girdle Mechanics |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |