Part of bile juice useful in digestion is:

Options

A. Bile salt
B. Bile pigment
C. Bile matrix
D. All of these

Answer

To answer the question regarding which part of bile juice is useful in digestion, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Bile Juice Composition**:
Bile juice is a digestive fluid produced by the liver and stored in the gallbladder. It consists of several components, including bile salts, bile pigments, and bile matrix.

2. **Identifying the Function of Bile Salts**:
Among the components of bile, bile salts play a crucial role in digestion. They are derived from cholesterol and are essential for the emulsification of fats.

3. **Emulsification Process**:
Bile salts help break down large fat globules into smaller lipid molecules. This process is known as emulsification, which increases the surface area for digestive enzymes to act upon.

4. **Digestion of Fats**:
Once the fats are emulsified into smaller globules, they can be more effectively digested by pancreatic enzymes in the small intestine, leading to better absorption of fatty acids and glycerol.

5. **Conclusion**:
Therefore, the part of bile juice that is useful in digestion is the **bile salts**, as they are specifically involved in the digestion of fats.

### Final Answer:
The part of bile juice useful in digestion is **bile salts**.

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