Testes and ovaries secrete hormones that are responsible for the development of male and female secondary sexual characteristics.
Hormones from which gland stimulate testes and ovaries to secrete their respective hormones?

Options

A. Thyroid
B. Pancreas
C. Adrenal gland
D. Pituitary gland

Answer

To answer the question about which gland stimulates the testes and ovaries to secrete their respective hormones, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Role of Testes and Ovaries**:
- Testes in males secrete testosterone, which is responsible for the development of male secondary sexual characteristics.
- Ovaries in females secrete estrogen and progesterone, which are responsible for the development of female secondary sexual characteristics.

2. **Identifying the Glands Involved**:
- The question asks which gland stimulates the testes and ovaries to secrete these hormones.

3. **Evaluating the Options**:
- **Thyroid Gland**: This gland secretes thyroxine, which regulates metabolism but does not stimulate the testes or ovaries.
- **Pancreas**: This gland secretes insulin and glucagon, which regulate blood sugar levels, not the hormones from testes or ovaries.
- **Adrenal Gland**: This gland is involved in the stress response and secretes hormones like adrenaline, but it does not directly stimulate the testes or ovaries.
- **Pituitary Gland**: This is known as the "master gland" because it secretes hormones that regulate other glands, including those that stimulate the testes and ovaries.

4. **Conclusion**:
- The gland that stimulates the testes and ovaries to secrete their respective hormones (testosterone from testes and estrogen/progesterone from ovaries) is the **Pituitary Gland**.

### Final Answer:
The hormones from the **Pituitary Gland** stimulate the testes and ovaries to secrete their respective hormones.

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