Which of the following is a gastro intestinal hormone ?

Options

A. Prolactin
B. Enterokinase
C. GH
D. FSH

Answer

To determine which of the following is a gastrointestinal hormone among the options given (prolactin, enterokinase, GH, or FSH), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Gastrointestinal Hormones**:
Gastrointestinal hormones are substances secreted by the gastrointestinal mucosa in response to food presence in the gut. They play a crucial role in regulating digestive processes, including the secretion of gastric and pancreatic juices.

2. **Analyze the Options**:
- **Prolactin**: This hormone is secreted by the anterior pituitary gland and is primarily involved in stimulating milk production. It is not related to gastrointestinal functions.
- **Enterokinase**: This is an enzyme that activates trypsinogen into trypsin in the intestine. It is secreted by the intestinal mucosa and plays a role in digestion, making it a gastrointestinal hormone.
- **Growth Hormone (GH)**: This hormone is also secreted by the anterior pituitary gland and is responsible for stimulating growth and cell reproduction. It does not have a direct role in gastrointestinal functions.
- **Follicle Stimulating Hormone (FSH)**: Similar to GH, FSH is secreted by the anterior pituitary and is involved in reproductive processes, specifically in the development of ovarian follicles and spermatogenesis.

3. **Identify the Correct Answer**:
Based on the analysis, enterokinase is the only option that fits the definition of a gastrointestinal hormone as it is secreted by the intestinal mucosa and aids in the digestive process.

### Conclusion:
The correct answer is **enterokinase**.

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