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Signals for parturition originate from...

Signals for parturition originate from

A

Fully develped foetus only

B

Placenta only

C

Oxytocin relased by material pituitary

D

Both A and B

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Signals for parturition originate from," we will analyze the options provided and understand the physiological processes involved in parturition. ### Step-by-Step Solution: 1. **Understanding Parturition**: - Parturition refers to the process of childbirth, which involves a series of events leading to the delivery of the baby. 2. **Identifying Sources of Signals**: - The question asks where the signals for parturition originate. We need to consider the physiological mechanisms involved. 3. **Option Analysis**: - **Option A: Fully developed fetus only**: - The fully developed fetus can send signals through the fetal ejection reflex, which is a response that triggers contractions. - **Option B: Placenta only**: - The placenta plays a role in hormone production, but it is not the sole source of signals for parturition. - **Option C: Oxytocin released by maternal pituitary**: - Oxytocin is a hormone released by the maternal pituitary gland that stimulates uterine contractions during labor. - **Option D: Both A and C**: - This option suggests that both the fully developed fetus and the oxytocin from the maternal pituitary are sources of signals for parturition. 4. **Conclusion**: - Based on the analysis, signals for parturition originate from both the fully developed fetus (which initiates the fetal ejection reflex) and the oxytocin released from the maternal pituitary gland. Therefore, the correct answer is **Option D: Both A and C**. ### Final Answer: **Option D: Both A and C**
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