Which of the following is absorbed in ileum ?

Options

A. Fat
B. Bile salts
C. Vitamin K
D. Glucose

Answer

To determine which of the following substances is absorbed in the ileum, we need to analyze the options provided: fat, bile salts, vitamin K, and glucose.

### Step-by-Step Solution:

1. **Understanding the Structure of the Small Intestine**:
- The small intestine is divided into three parts: the duodenum, jejunum, and ileum.
- Each part has specific roles in digestion and absorption.

2. **Absorption in Different Parts**:
- **Duodenum**: Primarily absorbs iron and some other minerals.
- **Jejunum**: The main site for the absorption of most nutrients, including carbohydrates and proteins.
- **Ileum**: The terminal part of the small intestine, responsible for absorbing bile salts and vitamin B12.

3. **Analyzing the Options**:
- **Fat**: While fats are absorbed in the small intestine, they are primarily absorbed in the jejunum through the lacteals (lymphatic vessels).
- **Bile Salts**: These are specifically absorbed in the ileum after they have emulsified fats during digestion.
- **Vitamin K**: While some vitamin K can be absorbed in the ileum, it is not the primary nutrient associated with this part.
- **Glucose**: This is absorbed mainly in the jejunum, not the ileum.

4. **Conclusion**:
- Based on the absorption characteristics of the ileum, the correct answer is **bile salts**. They are specifically absorbed in the terminal ileum.

### Final Answer:
**Bile salts** are absorbed in the ileum.