Which of the following helps in lubricating and adhering the mastricated food particles into a bolus

Options

A. Salivery amylase
B. Mucous
C. Secretion of lacrymal gland
D. Gastric juice

Answer

To answer the question "Which of the following helps in lubricating and adhering the masticated food particles into a bolus?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking which substance helps in the process of forming a bolus from masticated food. A bolus is a soft mass of chewed food that is ready to be swallowed.

2. **Identify the Options**: The options provided are:
- A) Salivary amylase
- B) Mucous
- C) Secretion of lacrimal gland
- D) Gastric juice

3. **Analyze Each Option**:
- **A) Salivary amylase**: This enzyme is responsible for breaking down starch into maltose. While it plays a role in digestion, it does not help in lubricating or adhering food particles into a bolus. Therefore, this option is incorrect.
- **B) Mucous**: Mucous is a slippery secretion produced by mucous membranes. It helps to lubricate food and makes it easier to form a bolus. This option is correct.
- **C) Secretion of lacrimal gland**: The lacrimal gland produces tears, which are not involved in the digestion or formation of a bolus. Hence, this option is incorrect.
- **D) Gastric juice**: Gastric juice contains hydrochloric acid and digestive enzymes, which are important for digestion in the stomach but do not assist in the initial formation of a bolus in the mouth. Therefore, this option is also incorrect.

4. **Conclusion**: After analyzing all the options, the correct answer is **B) Mucous**, as it helps in lubricating and adhering masticated food particles into a bolus.