Gastrointestinal hormone are

Options

A. Steroidal in nature
B. Proteinaceous in nature
C. Glycoproteinaceous in nature
D. Both (1) and (2)

Answer

**Step-by-Step Solution:**

1. **Understanding Gastrointestinal Hormones**: Gastrointestinal hormones are chemical messengers that play a crucial role in regulating various functions of the digestive system. They are secreted by endocrine cells located in different parts of the gastrointestinal (GI) tract.

2. **Classification of Gastrointestinal Hormones**: These hormones can be classified based on their chemical structure. They are primarily categorized into four major groups, which include:
- Peptides
- Amino acids
- Steroids
- Glycoproteins

3. **Nature of Gastrointestinal Hormones**: The gastrointestinal hormones are primarily proteolytic in nature, meaning they are made up of proteins or peptides. They can also be classified as neuropeptides, which are small protein-like molecules used by neurons to communicate with each other.

4. **Function of Gastrointestinal Hormones**: These hormones have various effects on gastrointestinal functions, including stimulating digestive enzyme secretion, regulating gastric acid secretion, and influencing gut motility.

5. **Conclusion**: Based on the classification and nature of gastrointestinal hormones, the correct answer is that they are primarily proteolytic in nature and can be classified as neuropeptides.

**Final Answer**: Gastrointestinal hormones are primarily proteolytic in nature and are classified as neuropeptides.

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