Oxytocin responsible for vigorous contraction of uterus at the time of child birth is synthesize by:-

Options

A. posterior pituitary gland
B. Hypothalamus
C. Both 1 and 2
D. Anterior pituitary gland

Answer

**Step-by-Step Solution:**

1. **Understanding Oxytocin**: Oxytocin is a hormone that plays a crucial role during childbirth by stimulating vigorous contractions of the uterus.

2. **Identifying the Source of Synthesis**: The question asks where oxytocin is synthesized. It is important to differentiate between synthesis and secretion.

3. **Synthesis Location**: Oxytocin is synthesized in the hypothalamus. This is the region of the brain responsible for producing several hormones, including oxytocin.

4. **Secretion Mechanism**: After synthesis in the hypothalamus, oxytocin is transported down nerve axons to the posterior pituitary gland, where it is stored and eventually released into the bloodstream.

5. **Evaluating Options**:
- **Option 1: Posterior Pituitary Gland** - This is incorrect because the posterior pituitary does not synthesize oxytocin; it only stores and releases it.
- **Option 2: Hypothalamus** - This is correct as the hypothalamus is where oxytocin is synthesized.
- **Option 3: Both 1 and 2** - This is incorrect because only the hypothalamus synthesizes oxytocin.
- **Option 4: Anterior Pituitary Gland** - This is incorrect as the anterior pituitary does not produce oxytocin.

6. **Conclusion**: The correct answer is that oxytocin is synthesized by the hypothalamus.

**Final Answer**: Oxytocin is synthesized by the hypothalamus.

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