Pituitary gland is regulated by -

Options

A. Adrenals
B. Pineal
C. Thyroid gland
D. Hypothalamus

Answer

### Step-by-Step Solution:

1. **Identify the Pituitary Gland**: The pituitary gland is often referred to as the "master gland" of the endocrine system because it regulates various hormonal functions in the body.

2. **Understand the Role of the Hypothalamus**: The hypothalamus is a region of the brain that plays a crucial role in regulating the pituitary gland. It is located just above the pituitary gland and is responsible for maintaining homeostasis.

3. **Releasing Hormones**: The hypothalamus releases specific hormones known as releasing hormones. These hormones travel to the pituitary gland and stimulate it to release its own hormones.

4. **Action on Anterior Pituitary**: The releasing hormones primarily act on the anterior part of the pituitary gland, which is responsible for producing various tropic hormones that influence other endocrine glands.

5. **Tropic Hormones**: The hormones released by the anterior pituitary are called tropic hormones. These hormones regulate the function of other endocrine glands, such as the thyroid gland, adrenal glands, and gonads.

6. **Conclusion**: Therefore, the pituitary gland is regulated by the hypothalamus through the release of releasing hormones, which in turn stimulate the pituitary to produce its hormones.

### Final Answer:
The pituitary gland is regulated by the hypothalamus.

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