Question

why is it necessary to maintain that pH level in the small intestine

Answer 1

The most acidic part of the human gastrointestinal tract is the stomach, which is generally around pH 1 to pH 3. The high acidity in the stomach fights bacteria that are ingested with food. As the distance increases from the stomach, the pH level gradually increases. The large intestine is pH 5.5 to pH 7.if this is so then our intestine would develop ulcers