A gland X is present over the surface of another gland Y, latter secretes a hormone that controls the metabolism of proteins, fats and carbohydrates. The X and Y are

Options

A. Parathyroid and thyroid gland, respectively
B. Pituitary and hypothalamus, respectively
C. Adrenal gland and kidney, respectively
D. Thymus and heart, respectively.

Answer

To solve the question about the glands X and Y, we need to analyze the information given and the options provided. Here’s a step-by-step breakdown:

### Step 1: Identify the Relationship Between Glands X and Y
- The question states that gland X is present over the surface of gland Y. This means that X is located on top of or surrounding Y.

### Step 2: Understand the Function of Gland Y
- Gland Y secretes a hormone that controls the metabolism of proteins, fats, and carbohydrates. This is a crucial detail because it helps narrow down which gland Y could be.

### Step 3: Analyze the Options
1. **Parathyroid and Thyroid Glands**: The parathyroid glands are located on the surface of the thyroid gland. The thyroid gland secretes thyroxine, which regulates metabolism.
2. **Pituitary and Hypothalamus**: The pituitary gland is located below the hypothalamus, not on its surface.
3. **Adrenal Gland and Kidney**: The adrenal glands sit on top of the kidneys, but the kidneys do not secrete hormones that control metabolism in the same way as the thyroid.
4. **Thymus and Heart**: The thymus is located in front of the heart, not on its surface.

### Step 4: Eliminate Incorrect Options
- **Pituitary and Hypothalamus**: Incorrect because the pituitary is below the hypothalamus.
- **Thymus and Heart**: Incorrect because the thymus is in front of the heart, not on its surface.
- **Adrenal Gland and Kidney**: While the adrenal glands are on top of the kidneys, the kidneys do not primarily control metabolism.

### Step 5: Confirm the Correct Option
- The only viable option left is **Parathyroid and Thyroid Glands**. The parathyroid glands are located on the surface of the thyroid gland, and the thyroid gland secretes thyroxine, which is responsible for the metabolism of proteins, fats, and carbohydrates.

### Final Answer
- Gland X is the **Parathyroid Gland** and gland Y is the **Thyroid Gland**.

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