Final answer:
The pH in the stomach is lower than the pH in the small intestine because the stomach has a highly acidic environment for the breakdown of food, while the small intestine has a slightly higher pH for further digestion.
Step-by-step explanation:
The pH in the stomach is lower than the pH in the small intestine.
In the stomach, the pH is highly acidic, ranging between 1.5 and 2.5, which is required for the chemical breakdown of food. This acidic environment helps in digesting certain foods and killing bacteria.
On the other hand, the small intestine has a more basic pH. After the food leaves the stomach and enters the small intestine, the pH changes to a slightly higher level, which is necessary for the digestion of foods that were not fully broken down in the stomach.