GIP (Gastric inhibitory peptide)

Options

A. Inhibits the gastric secretion and motility
B. Inhibits the gastric secretion only
C. Activates the gastric secretion and motility
D. Activates the gastric secretion only

Answer

**Step-by-Step Solution:**

1. **Understanding GIP (Gastric Inhibitory Peptide):** GIP is a hormone that plays a significant role in the digestive system, particularly in regulating gastric functions.

2. **Function of GIP:** The primary function of GIP is to inhibit gastric secretion. This means that when GIP is released, it reduces the production of gastric juices in the stomach.

3. **GIP and Gastric Motility:** It is important to note that GIP does not influence gastric motility. Gastric motility refers to the movement of the stomach muscles to mix and propel food. GIP specifically does not activate or inhibit this process.

4. **Analyzing the Options:**
- **Option A:** Inhibits gastric secretion and motility - Incorrect, as GIP does not affect motility.
- **Option B:** Inhibits gastric secretion only - Correct, as this is the primary function of GIP.
- **Option C:** Activates gastric secretion and motility - Incorrect, as GIP does not activate either.
- **Option D:** Activates gastric secretion only - Incorrect, as GIP inhibits secretion.

5. **Conclusion:** Based on the functions of GIP, the correct answer is that it inhibits gastric secretion only.

**Final Answer:** The correct option is **B: inhibits gastric secretion only.**

---