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Question #45361
The Question
A male patient presents with infertility. Hormonal profiling reveals normal levels of Luteinizing Hormone (LH) and testosterone, but a severe, selective deficiency of Follicle Stimulating Hormone (FSH). Based on the hormonal control of the male reproductive system, which of the following is the most likely observation in his seminal fluid and testicular biopsy, and what is the correct physiological reason?
Options
- A.
Presence of structurally immature spermatids in the lumen due to the failure of spermiogenesis, as Sertoli cells lack FSH stimulation.
- B.
Complete arrest of spermatogenesis at the primary spermatocyte stage due to the absence of androgen-driven mitotic divisions.
- C.
Accumulation of fully formed, mature spermatozoa embedded in the seminiferous tubules due to the failure of spermiation.
- D.
Degeneration of Leydig cells leading to a lack of testosterone, resulting in the arrest of meiosis I.
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
Sertoli_Cells|FSH|Testosterone|Spermiation
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Differentiating the specific roles of LH (Leydig cells -> Androgens -> Spermatogenesis) and FSH (Sertoli cells -> Factors -> Spermiogenesis).
The trap relies on functional overlap; students frequently confuse 'Spermatogenesis', 'Spermiogenesis', and 'Spermiation', assuming a drop in any pituitary gonadotropin halts the entire pathway at the spermatogonia stage.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Human Reproduction - Class 12 |
| Concept | Spermiogenesis vs. Spermiation |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |