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Question #45418
The Question
The process of parturition is induced by a complex neuroendocrine mechanism involving the fetal ejection reflex. If a high dose of exogenous progesterone is administered to a pregnant female exactly at full term, which of the following will be the primary physiological consequence?
Options
- A.
The positive feedback loop of parturition will be arrested because the myometrium becomes refractory to oxytocin, preventing the cascade of stronger uterine contractions.
- B.
The maternal anterior pituitary will be strongly inhibited from releasing oxytocin, directly halting the neuroendocrine reflex.
- C.
The fetal ejection reflex will be initiated normally, but maternal oxytocin will induce tetanic contractions in the endometrium.
- D.
The release of relaxin from the placenta will be competitively inhibited, preventing the relaxation of the pelvic ligaments.
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
Oxytocin|Fetal_Ejection_Reflex|Corpus_Luteum
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often memorize that 'oxytocin causes contractions' but fail to realize that the target tissue's (myometrium) sensitivity is dictated by progesterone withdrawal.
The distractors utilize classic NEET 'Location Traps' and 'Micro-Terminology' errors, specifically swapping Posterior for Anterior pituitary, and Myometrium for Endometrium.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Chemical Coordination and Integration - Class 11 |
| Concept | Feedback Mechanism Loops |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |