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Question #45543
The Question
Copper-releasing IUDs (e.g., CuT, Multiload 375) rely on the continuous release of copper ions to prevent conception. If a female using a CuT experiences a prolonged state of severe systemic hyperthermia, how would this thermal shift most likely affect the immediate contraceptive action within the uterine microenvironment, based on the kinetic principles of ion dissolution?
Options
- A.
The rate of Cu2+ dissolution increases, leading to an enhanced suppression of sperm motility and fertilizing capacity.
- B.
The thermal shift alters the IUD's mechanism, making the cervix hostile to sperms by thickening the cervical mucus.
- C.
The elevated temperature denatures the copper ions, thereby restoring the normal fertilizing capacity of the sperms.
- D.
The hyperthermia decreases the phagocytosis of sperms within the uterus by directly inhibiting local macrophages.
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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
IUDs|Thermal Tolerance Ranges|Enzyme Kinetic Inhibition
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Integrating chemical kinetics (temperature dependence of dissolution) with human reproductive physiology.
The trap relies on Functional Confusion—students frequently mix up the specific mechanisms of Cu-IUDs (sperm motility suppression) with Hormone-releasing IUDs (cervical mucus thickening), which is tested in Option B.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Reproductive Health - Class 12 |
| Concept | IUD Physiological Mechanism |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |