Endocrinology & Reproduction · NEET PG Preparation Physiology
A 28-year-old pregnant woman in her 38th week of gestation is monitored during labor. The stretching of the uterine cervix by the fetal presenting pa…
Practice question from Endocrinology & Reproduction (NEET PG Preparation Physiology), with the correct answer and a step-by-step solution.
easy · MCQ · Q-DFCA13
A 28-year-old pregnant woman in her 38th week of gestation is monitored during labor. The stretching of the uterine cervix by the fetal presenting part stimulates oxytocin release from the posterior pituitary, which in turn increases uterine contractions and further stretches the cervix. This physiological mechanism is a classic example of:
- A.Negative feedback control
- B.Positive feedback controlCorrect answer
- C.Feedforward regulation
- D.Autocrine signaling
Solution
Positive feedback is a process where a change in a variable triggers a response that amplifies or reinforces the initial change. Parturition via the Ferguson reflex (oxytocin release driven by cervical stretch) is a quintessential example of physiological positive feedback.
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