Enterogastrone is:

Options

A. Hormone secreted by mucosa
B. Enzyme secreted by mucosa
C. Hormone secreted by duodenal mucosa
D. Secreted by endocrine gland related to digestion

Answer

### Step-by-Step Solution:

1. **Understanding Enterogastrone**:
- Enterogastrone is a substance that plays a role in the digestive process. It is important to identify its nature and origin.

2. **Identifying the Source**:
- Enterogastrone is secreted by the duodenal mucosa, which is the lining of the duodenum, the first part of the small intestine.

3. **Function of Enterogastrone**:
- The primary function of enterogastrone is to inhibit gastric activities. This includes reducing gastric movements and gastric secretions.

4. **Trigger for Secretion**:
- The secretion of enterogastrone occurs when chyme (partially digested food) enters the intestine. This signals the body that gastric activities are not needed at that moment.

5. **Conclusion**:
- Based on the above points, enterogastrone can be classified as a hormone secreted by the duodenal mucosa, which functions to inhibit gastric activity.

### Final Answer:
Enterogastrone is a hormone secreted by the duodenal mucosa that inhibits gastric activity.