GnRH secreted from hypothalamus mainly stimulates the release of:

Options

A. Thyroxine from thyroid gland
B. ADH from posterior pituitary
C. FSH and LH from anterior pituitary
D. Aldosterone from adrenals

Answer

To solve the question regarding what GnRH (gonadotropin-releasing hormone) secreted from the hypothalamus mainly stimulates the release of, we can follow these steps:

### Step 1: Understand the Role of GnRH
GnRH is a hormone produced by the hypothalamus that plays a crucial role in the regulation of the reproductive system. It is responsible for stimulating the anterior pituitary gland to release other hormones.

**Hint:** Remember that GnRH is primarily involved in reproductive hormone regulation.

### Step 2: Identify the Target Hormones
The main hormones that GnRH stimulates the release of from the anterior pituitary are Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). These hormones are collectively referred to as gonadotropins.

**Hint:** Focus on the hormones that are directly involved in the reproductive processes.

### Step 3: Evaluate the Options
Now, let's evaluate the given options:
1. **Thyroxine from thyroid gland** - This hormone is not related to GnRH.
2. **ADH from the posterior pituitary** - This hormone is also not stimulated by GnRH.
3. **Follicle Stimulating Hormone and Luteinizing Hormone from the anterior pituitary** - This is the correct answer as GnRH stimulates their release.
4. **Aldosterone from adrenals** - This hormone is unrelated to GnRH.

**Hint:** Eliminate options that do not relate to the reproductive system.

### Step 4: Conclusion
Based on the evaluation, the correct answer is that GnRH secreted from the hypothalamus mainly stimulates the release of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH) from the anterior pituitary.

**Final Answer:** Follicle Stimulating Hormone and Luteinizing Hormone from the anterior pituitary (Option 3).

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