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Question #46850
The Question
The administration of combined oral contraceptives (estrogen-progesterone combinations) utilizes negative feedback hormone mimicry to disrupt the Hypothalamic-Pituitary-Ovarian (HPO) axis. All of the following are physiological consequences of this disruption, EXCEPT:
Options
- A.
Inhibition of the pre-ovulatory LH surge, preventing the release of the secondary oocyte.
- B.
Suppression of FSH secretion from the anterior pituitary, which arrests the development of ovarian follicles.
- C.
Maintenance of a highly glandular and hypertrophied endometrium to physically block blastocyst implantation.
- D.
Alteration of cervical gland secretions, producing thick mucus that retards sperm entry and transport.
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
Glandular Secretion Mechanism|Progesterone/Estrogen Feedback|Reproductive Cycle Disruption
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often fall for the 'Progesterone Paradox' trap.
Because NCERT states that progesterone is the 'pregnancy hormone' responsible for maintaining the secretory endometrium, students falsely deduce that contraceptive pills containing synthetic progesterone must cause massive endometrial hypertrophy.
They fail to synthesize that continuous, non-cyclical exogenous hormone mimicry actually disrupts the normal glandular development, rendering the lining thin and hostile to implantation.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Structural Organisation in Animals - Class 11 |
| Concept | Glandular Secretion Mechanism |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |