The hormones controlling secondary sexual characters include

Options

A. Thyroxine
B. FSH and LH
C. GH and FSH
D. Testosterone and estrogen.

Answer

To answer the question about the hormones controlling secondary sexual characters, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Role of Hormones in Sexual Development**:
- Understand that secondary sexual characteristics are features that develop during puberty and are influenced by sex hormones.

2. **List the Hormones Mentioned**:
- The options provided include:
- Thyroxine
- FSH (Follicle Stimulating Hormone) and LH (Luteinizing Hormone)
- GH (Growth Hormone) and FSH
- Testosterone and Estrogen

3. **Analyze Each Hormone**:
- **Thyroxine**: This hormone is produced by the thyroid gland and is primarily involved in regulating metabolism, not in the development of secondary sexual characteristics.
- **FSH and LH**: These hormones are produced by the anterior pituitary gland and play roles in reproductive processes, such as stimulating ovarian follicles and ovulation, but they do not directly control secondary sexual characteristics.
- **GH**: Growth Hormone is also produced by the anterior pituitary and is mainly responsible for growth and metabolism, not specifically for secondary sexual characteristics.
- **Testosterone**: This is the primary male sex hormone produced by the Leydig cells in the testes. It is crucial for the development of male secondary sexual characteristics such as facial hair, deep voice, and muscle growth.
- **Estrogen**: This is the primary female sex hormone produced by the ovarian follicles. It is essential for the development of female secondary sexual characteristics such as breast development and menstrual cycle regulation.

4. **Determine the Correct Answer**:
- Based on the analysis, the hormones that directly control the development of secondary sexual characteristics are **Testosterone and Estrogen**.

5. **Conclusion**:
- Therefore, the correct answer to the question is **Testosterone and Estrogen**.

### Final Answer:
The hormones controlling secondary sexual characters include **Testosterone and Estrogen**.

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