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

Options

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

Answer

To determine which substance helps in lubricating and adhering masticated food particles into a bolus, we can analyze the options provided:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the substance that helps in lubricating and binding the chewed food into a cohesive mass known as a bolus.

2. **Evaluating the Options**:
- **Option 1: Salivary Amylase**: This enzyme is responsible for the digestion of starches in the mouth. While it plays a role in the digestive process, it does not contribute to the lubrication or adhesion of food particles. Therefore, this option is incorrect.

- **Option 2: Mucus**: Mucus is a slippery secretion produced by mucous membranes. It serves several functions, including protecting the gastrointestinal lining and keeping food particles moist. Importantly, the sticky consistency of mucus helps to adhere food particles together, forming a bolus. This option is correct.

- **Option 3: Secretion of Lacrimal Glands**: Lacrimal glands produce tears, which are not involved in the digestive process or in the formation of a bolus. Thus, this option is incorrect.

- **Option 4: Gastric Juice**: Gastric juice is involved in digestion in the stomach but does not play a role in the initial formation of a bolus in the mouth. Therefore, this option is also incorrect.

3. **Conclusion**: Based on the evaluation of the options, the correct answer is **Mucus**, as it helps in lubricating and adhering the masticated food particles into a bolus.

### Final Answer:
**Mucus helps in lubricating and adhering the masticated food particles into a bolus.**

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