Which one is a gastrointestinal hormone

Options

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

Answer

To determine which one of the given options is a gastrointestinal hormone, we need to analyze each option provided:

1. **Prolactin**: This hormone is primarily involved in milk production and lactation. It is not classified as a gastrointestinal hormone.

2. **Growth Hormone**: This hormone is responsible for growth and development in the body. It does not play a direct role in the gastrointestinal system.

3. **Enterokinase**: This is an enzyme produced by the cells of the duodenum. It is involved in the digestion process by activating other digestive enzymes, particularly trypsinogen into trypsin. It is secreted from the intestinal glands when food enters the stomach, making it relevant to digestion.

4. **Follicle Stimulating Hormone (FSH)**: This hormone is involved in the reproductive system, particularly in the regulation of the menstrual cycle and spermatogenesis. It is not related to gastrointestinal functions.

Based on the analysis, the correct answer to the question "Which one is a gastrointestinal hormone?" is **Enterokinase**.

### Step-by-Step Solution:
1. **Identify the options**: List the given hormones and enzymes.
2. **Analyze each option**: Determine the function of each hormone or enzyme.
3. **Focus on gastrointestinal relevance**: Identify which option is directly involved in the digestive process.
4. **Conclude with the correct answer**: Select Enterokinase as the gastrointestinal hormone.