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Question #45549
The Question
A 35-year-old male undergoes a bilateral vasectomy as a permanent method of contraception. Six months post-surgery, which of the following statements correctly describes his physiological and endocrine status?
Options
- A.
Spermatogenesis ceases entirely due to the disruption of the Inhibin-FSH feedback loop caused by mechanical blockage.
- B.
The volume of ejaculate decreases by approximately 70% because the secretions of the seminal vesicles and prostate are blocked.
- C.
The Hypothalamic-Pituitary-Gonadal axis remains fully functional, with Sertoli cells continuing to secrete Inhibin to regulate FSH levels.
- D.
Interstitial cells of Leydig undergo atrophy due to the lack of gamete release, leading to a compensatory spike in Luteinizing Hormone (LH).
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
Feedback Mechanism Loops|Hormone Half-life Logic|Sertoli Cell Functions
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between the exocrine function (sperm transport via ducts) and endocrine function (hormone transport via blood) of the testes.
Common Misconception: Students frequently assume that ligating the vas deferens either halts spermatogenesis due to 'pressure build-up' or disrupts hormonal feedback loops (like Inhibin/FSH or Testosterone/LH).
Furthermore, students often confuse the anatomical sequence, incorrectly believing vasectomy blocks seminal vesicle secretions, which would drastically reduce semen volume.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Reproductive Health - Class 12 |
| Concept | Sterilization Irreversibility |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |