Gonadotropin releasing hormones are formed by

Options

A. Adenohypophysis .
B. Neurohypophysis
C. Hypothalamus
D. Both (A) and (B )

Answer

**Step-by-Step Solution:**

1. **Understanding Gonadotropin-Releasing Hormone (GnRH):**
- Gonadotropin-releasing hormone (GnRH) is a peptide hormone that plays a crucial role in the reproductive system. It is responsible for stimulating the release of other hormones that regulate reproductive functions.

2. **Identifying the Source of GnRH:**
- To determine where GnRH is formed, we need to look at the options provided:
- Option 1: Adenohypophysis (anterior pituitary)
- Option 2: Neurohypophysis (posterior pituitary)
- Option 3: Hypothalamus
- Option 4: Both A and B

3. **Analyzing Each Option:**
- **Adenohypophysis:** This part of the pituitary gland produces hormones like growth hormone, thyroid-stimulating hormone, and others, but it does not produce GnRH. Instead, it responds to GnRH.
- **Neurohypophysis:** This part of the pituitary gland stores and releases hormones like oxytocin and vasopressin, but it does not produce GnRH.
- **Hypothalamus:** This is the correct source of GnRH. The hypothalamus synthesizes and secretes GnRH, which then stimulates the anterior pituitary to release FSH and LH.
- **Both A and B:** Since neither the adenohypophysis nor the neurohypophysis produces GnRH, this option is incorrect.

4. **Conclusion:**
- After analyzing all the options, the correct answer is **Option 3: Hypothalamus**. This is where gonadotropin-releasing hormone is formed.