Large number of hormones are secreted by

Options

A. Pituitary hormones
B. Thyroid
C. Hypothalamus
D. Adrenal

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which gland secretes a large number of hormones. We need to evaluate the options provided: pituitary gland, thyroid gland, hypothalamus, and adenohypophysis (anterior pituitary).

2. **Identifying the Glands**:
- **Pituitary Gland**: Known as the "master gland," it regulates many bodily functions and secretes several hormones.
- **Thyroid Gland**: Produces hormones that regulate metabolism, but the number of hormones is limited compared to the pituitary.
- **Hypothalamus**: Connects the nervous system to the endocrine system and regulates the pituitary gland's hormone secretion.
- **Adenohypophysis**: This is another term for the anterior part of the pituitary gland, which also secretes hormones.

3. **Analyzing Hormone Secretion**:
- The **hypothalamus** produces several releasing and inhibiting hormones that control the secretion of hormones from the pituitary gland.
- The **pituitary gland** itself secretes a variety of hormones but is primarily regulated by the hypothalamus.

4. **Conclusion**: The hypothalamus is responsible for the secretion of a large number of hormones, including those that stimulate the pituitary gland to release its hormones. Therefore, it plays a crucial role in the endocrine system by regulating multiple hormone secretions.

5. **Final Answer**: The gland that secretes a large number of hormones is the **hypothalamus**.