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Question #45415
The Question
Consider the anatomical origins and hormonal axes of the pituitary gland in regulating the female reproductive system. Which of the following statements is INCORRECT?
Options
- A.
The adenohypophysis originates from the embryonic oral ectoderm, and its gonadotropin release is strongly suppressed by high levels of progesterone during the luteal phase.
- B.
The neurohypophysis synthesizes oxytocin and vasopressin, releasing them under direct neural regulation to act on the uterine myometrium and distal renal tubules, respectively.
- C.
During the late follicular phase, peak secretion of estrogen from the mature Graafian follicle exerts a positive feedback on the adenohypophysis, triggering the LH surge.
- D.
Unlike the adenohypophysis which is regulated via the hypophyseal portal system, the neurohypophysis stores hormones that are transported axonally from the hypothalamus.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Ovarian Follicle Stages|Progesterone/Estrogen Feedback|Adenohypophysis vs Neurohypophysis Origin
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Location Trap and Functional Overlap.
Students often confuse the site of 'release' with the site of 'synthesis' for posterior pituitary hormones.
While the neurohypophysis releases oxytocin to act on the myometrium, it is synthesized in the hypothalamus.
Furthermore, the question tests the integration of embryonic origin (oral ectoderm vs neural down-growth) with complex feedback mechanisms (positive feedback of estrogen vs negative feedback of progesterone).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Chemical Coordination and Integration - Class 11 |
| Concept | Adenohypophysis vs Neurohypophysis Origin |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |