Mammary glands are

Options

A. Apocrine
B. Merocrine
C. Holocrine
D. Heterocrine

Answer

### Step-by-Step Text Solution:

1. **Understanding Gland Types**:
- There are different types of glands based on their secretion methods: apocrine, merocrine, holocrine, and heterocrine.

2. **Defining Apocrine Glands**:
- Apocrine glands secrete their products by first packaging them into vesicles. These vesicles then bud off from the plasma membrane, releasing the secretion.

3. **Identifying Mammary Glands**:
- The mammary glands, which are responsible for milk production in lactating females, are classified as apocrine glands. This is because they release their milk through the process of packaging and budding off from the plasma membrane.

4. **Explaining Merocrine Glands**:
- Merocrine glands, on the other hand, secrete their products directly through exocytosis without losing any part of the cell. Salivary glands and pancreatic glands are examples of merocrine glands.

5. **Understanding Holocrine Glands**:
- Holocrine glands produce their secretion within the cytoplasm of the cell. When the secretion is ready, the cell ruptures, releasing the contents and destroying the cell in the process. Sebaceous glands are an example of holocrine glands.

6. **Conclusion**:
- Based on the definitions and examples provided, mammary glands are classified as apocrine glands, as they secrete their products by packaging them into vesicles and then releasing them from the cell.

### Final Answer:
Mammary glands are apocrine glands.

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