A : Oxytocin acts on the uterine muscles and cause stronger uterine contractions which in turn stimulates further secretion of oxytocin
R : Oxytocin is released form maternal pituitary

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)
C. If Assertion is true statement but Reason is false then mark (3)
D. If both Assertion and Reason are false statement then Mark (4)

Answer

**Step-by-Step Solution:**

1. **Understanding the Assertion (A):**
- The assertion states that oxytocin acts on the uterine muscles to cause stronger contractions, which in turn stimulates further secretion of oxytocin. This describes a positive feedback mechanism during childbirth (parturition).

2. **Understanding the Reason (R):**
- The reason states that oxytocin is released from the maternal pituitary. This is a factual statement about the source of oxytocin during childbirth.

3. **Analyzing the Mechanism:**
- During parturition, signals from the fully developed fetus and placenta trigger the hypothalamus. The hypothalamus then sends a signal to the posterior pituitary gland to release oxytocin into the bloodstream.

4. **Role of Oxytocin:**
- Once released, oxytocin causes the uterine muscles to contract. These contractions help in pushing the baby out and also stimulate the release of more oxytocin, creating a cycle of increasing contractions.

5. **Fetal Ejection Reflex:**
- The process described is known as the fetal ejection reflex, which is a neuroendocrine mechanism that enhances the release of oxytocin in response to uterine contractions.

6. **Conclusion:**
- Both the assertion and reason are correct; however, the reason does not adequately explain the assertion. The assertion is about the effects of oxytocin, while the reason merely states where oxytocin is released from.

7. **Final Answer:**
- Therefore, while both statements are true, the reason does not correctly explain the assertion. The correct conclusion is that both A and R are correct, but R is not the correct explanation for A.

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