Mucus secreted by the goblet cells, combined with bicarbonates maintains the alkaline medium of the intestine. The source of bicarbonates is :

Options

A. Intestinal mucosa
B. Gall bladdar
C. Pancreas
D. Brunner's glands

Answer

To solve the question regarding the source of bicarbonates that maintain the alkaline medium of the intestine, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Bicarbonates**:
- Bicarbonates are important for neutralizing the acidity of the stomach contents as they enter the small intestine. This helps to create an alkaline environment which is necessary for the proper functioning of intestinal enzymes.

2. **Identify the Source of Bicarbonates**:
- The question asks for the source of bicarbonates in the intestine. We need to evaluate the options provided.

3. **Evaluate Each Option**:
- **Option 1: Intestinal Mucosa**:
- The intestinal mucosa primarily serves as a barrier and does not produce bicarbonates.
- **Option 2: Gallbladder**:
- The gallbladder stores bile, which helps in the digestion of fats, but it does not produce bicarbonates.
- **Option 3: Pancreas**:
- The pancreas secretes bicarbonate ions into the small intestine to neutralize stomach acid. This is the correct source of bicarbonates.
- **Option 4: Brunner's Glands**:
- Brunner's glands are located in the duodenum and secrete alkaline mucus, but they are not the primary source of bicarbonates.

4. **Conclusion**:
- The correct answer is **Option 3: Pancreas**, as it is the organ responsible for producing and secreting bicarbonates into the intestine.

### Final Answer:
The source of bicarbonates is the **Pancreas**.

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