Read the following statements
i. Saliva secretion is controlled by neural activity
ii.Myoenteric plexum controls the mobility fo GI tract
iii. Para sympathetic nervcs increases the G.I secretion

Options

A. Only I and II are correct
B. Only ll and III are correct
C. Only I & III are correct
D. All are correct

Answer

To solve the question, we need to analyze each of the statements provided and determine their validity based on our understanding of the digestive system and its regulation.

### Step-by-Step Solution:

1. **Evaluate Statement i: "Saliva secretion is controlled by neural activity."**
- Saliva secretion is indeed primarily regulated by neural mechanisms. The sight, smell, and thought of food can stimulate the salivary glands to produce saliva. This process is primarily controlled by the autonomic nervous system, particularly the parasympathetic nervous system. Therefore, this statement is **correct**.

2. **Evaluate Statement ii: "Myoenteric plexus controls the mobility of the GI tract."**
- The myoenteric plexus, also known as Auerbach's plexus, is located between the longitudinal and circular muscle layers of the gastrointestinal tract. It plays a crucial role in regulating the motility of the GI tract, coordinating muscle contractions for peristalsis. Thus, this statement is also **correct**.

3. **Evaluate Statement iii: "Parasympathetic nerves increase the GI secretion."**
- The parasympathetic nervous system stimulates digestive activities, including increasing the secretion of digestive juices and enzymes in the GI tract. This is in contrast to the sympathetic nervous system, which generally inhibits digestive functions. Therefore, this statement is **correct**.

4. **Conclusion:**
- Since all three statements are correct, the answer to the question is that **all statements are correct**.

### Final Answer:
All statements (i, ii, and iii) are correct.

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