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Question #45383
The Question
Lactational amenorrhea enhances a female's biological fitness by preventing overlapping gestations, ensuring optimal metabolic resource partitioning for the nursing infant. Regarding the neuroendocrine mechanism of this phenomenon, all of the following statements are correct, EXCEPT:
Options
- A.
The intense suckling stimulus suppresses the release of dopamine from the hypothalamus, allowing hyperprolactinemia.
- B.
Elevated prolactin levels exert a strong negative feedback on the hypothalamus, decreasing the pulsatile secretion of GnRH.
- C.
The consequent suppression of gonadotropins prevents the LH surge, thereby inhibiting ovulation and subsequent implantation.
- D.
High levels of oxytocin released from the posterior pituitary synergize with prolactin to directly arrest the development of ovarian follicles.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Evolutionary_Exception
Tackle problems where standard rules evolve or change based on specific environmental constraints.
Concepts Behind This Question
Implantation|Lactational_Amenorrhea_Logic|Ecological_Fitness
Why This Question Is Tricky
Common Mistakes
Functional Confusion Trap: The conceptual pivot relies on distinguishing the distinct roles of the two primary lactation hormones.
Students frequently confuse or conflate the functions of Prolactin (milk synthesis and GnRH inhibition leading to amenorrhea) with Oxytocin (milk ejection).
Option D exploits this by falsely attributing an ovarian-arresting function to oxytocin.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Human Reproduction - Class 12 |
| Concept | Implantation and Syncytiotrophoblast |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |