Vertebrate salivary glands and exocrine part of pancreas are
(a) Apocrine
(b) Holocrine
(c) Epicrine
(d) Merocrine

Options

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

Answer

To solve the question regarding the classification of vertebrate salivary glands and the exocrine part of the pancreas, we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understand the Types of Glandular Secretion**:
- Glands can be classified based on how they secrete their products. The main types are:
- **Merocrine**: Secretion occurs via exocytosis without loss of cellular material.
- **Apocrine**: Secretion involves the loss of part of the cell along with the secretion.
- **Holocrine**: The entire cell disintegrates to release its contents.
- **Epicrine**: This term is less commonly used and is not typically associated with glandular secretion.

2. **Identify the Function of Salivary Glands and Exocrine Pancreas**:
- Salivary glands produce saliva, which is secreted into the mouth.
- The exocrine part of the pancreas secretes digestive enzymes into the small intestine.

3. **Determine the Secretion Mechanism**:
- Both salivary glands and the exocrine pancreas release their secretions through the process of **exocytosis**. This means that the secretory cells release their products into ducts without losing any part of themselves.

4. **Classify the Glands**:
- Since both the salivary glands and the exocrine pancreas release their secretions via exocytosis and do not lose any part of their cells, they are classified as **merocrine glands**.

5. **Select the Correct Answer**:
- Based on the analysis, the correct answer to the question is **(d) Merocrine**.

### Final Answer:
(d) Merocrine