Before You Begin
Question #45414
The Question
In a hypothetical clinical scenario, a localized micro-thrombosis completely obstructs the hypophyseal portal veins without affecting the axonal tracts of the hypothalamo-hypophyseal system. Based on the distinct regulatory mechanisms of the pituitary gland, which of the following endocrine profiles will be observed?
Options
- A.
Complete cessation of hormone release from the pars nervosa, while the pars distalis functions normally.
- B.
Drastic reduction in the systemic levels of LH, FSH, and TSH, while the release of Oxytocin and ADH continues.
- C.
Accumulation of hypothalamic releasing hormones in the pars nervosa due to the blocked vascular transport.
- D.
Immediate cessation of Vasopressin synthesis in the hypothalamus due to the loss of vascular feedback.
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
Adenohypophysis|Neurohypophysis|Hypothalamo-Hypophyseal Portal System
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Differentiating the vascular control of the adenohypophysis (portal system) from the direct neural control of the neurohypophysis (axonal transport).
Common Misconception: Students often assume the entire pituitary gland is controlled by a single vascular or neural pathway, failing to recognize that a portal blockage selectively induces anterior hypopituitarism while sparing posterior pituitary function.
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 |