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Question #45541
The Question
A female using a Copper-releasing IUD (Cu-T) is concurrently prescribed a synthetic progestogen pill. Regarding the dual contraceptive blockade established in her reproductive tract, which of the following statements is INCORRECT?
Options
- A.
The initial barrier encountered by ascending spermatozoa is the progestogen-induced thickening of cervical mucus, which retards their entry.
- B.
Spermatozoa that bypass the cervical barrier are subjected to increased phagocytosis and suppression of motility by Cu++ ions in the uterine cavity.
- C.
The synthetic progestogen overrides the normal menstrual cycle by exerting positive feedback on the HPO axis, thereby inhibiting ovulation.
- D.
The contraceptive efficacy relies on the Cu-T acting locally to impair fertilizing capacity, while the progestogen acts both locally and systemically.
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
IUDs|Progesterone/Estrogen Feedback|Uterine Environment
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between negative and positive feedback in the HPO axis.
Students often know progestogens 'inhibit ovulation' but fall for the 'positive feedback' word-play trap.
The question also tests the anatomical sequence of the reproductive tract (Cervix -> Uterus) to establish the hierarchy of the 'double-blockade' (mucus hostility followed by uterine phagocytosis).
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 |