What is cholecystokinin
(a) Bile pigments
(b) Gastro-intestinal hormone
(c) Enzyme
(d) Lipid

Options

A. Bile pigments
B. Gastro-intestinal hormone
C. Enzyme
D. Lipid

Answer

To answer the question "What is cholecystokinin?" we will analyze the options provided:

1. **Understanding Cholecystokinin**:
- Cholecystokinin (CCK) is a peptide hormone that plays a significant role in digestion.
- It is secreted by the cells in the mucosa of the duodenum, which is the first part of the small intestine.

2. **Evaluating the Options**:
- **(a) Bile pigments**: Bile pigments are substances that result from the breakdown of hemoglobin and are not related to cholecystokinin. Therefore, this option is incorrect.
- **(b) Gastro-intestinal hormone**: Cholecystokinin is indeed a hormone that is produced in the gastrointestinal tract, specifically in the duodenum. This option is correct.
- **(c) Enzyme**: Cholecystokinin is not an enzyme; rather, it stimulates the release of digestive enzymes from the pancreas. Thus, this option is incorrect.
- **(d) Lipid**: Cholecystokinin is not a lipid; it is a hormone. Therefore, this option is also incorrect.

3. **Conclusion**:
- Based on the analysis, the correct answer is **(b) Gastro-intestinal hormone**.

**Final Answer**: (b) Gastro-intestinal hormone

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