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Question #47411
The Question
A patient subjected to prolonged bed rest exhibits a severe decline in musculoskeletal efficiency, characterized by both a loss of active force generation and an increased susceptibility to fractures. Which of the following statements regarding the physiological and pathological changes in this patient is INCORRECT?
Options
- A.
The loss of active force generation is a result of disuse atrophy, characterized by a net degradation of myofilament proteins like actin and myosin.
- B.
The concurrent muscle and bone weakening illustrates a dual failure: a protein-based contractile failure and a mineral-based structural support failure.
- C.
The increased susceptibility to fractures is due to a reduction in bone mass, as the lack of mechanical weight-bearing stress favors osteoclast activity over osteoblasts.
- D.
The skeletal fragility observed is primarily due to the progressive degeneration of articular cartilage and synovial membrane inflammation, which are the defining features of osteoporosis.
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
Actin|Myosin|Troponin|Bone_Mineralization
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: The trap relies on the student's ability to strictly differentiate between the anatomical and pathological definitions of Osteoporosis (loss of bone mineral density/matrix) and Arthritis (degeneration of articular cartilage and joint inflammation).
Students often conflate all skeletal fragilities under a generic umbrella, failing to distinguish between mineral-based skeletal failure and joint-based structural failure.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Locomotion and Movement - Class 11 |
| Concept | Osteoporosis vs. Arthritis |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |