Question

what would be a good thing about pH changes along digestive tract

Answer 1

Lower pH indicates an acid environment and higher pH indicates an alkaline environment. Not all parts of our digestive tract have the same pH because different stages of the digestive process necessitate different levels of acidity. Saliva components are responsible to maintain the pH in our mouth between 6.5 and 7. Therefore, the enzyme salivary amylase can start to break down carbohydrates. The enzymes in the stomach such as pepsin can work best at a pH around 2. On the other hand, enzymes in the intestines, such as peptidases and maltase work best at a pH around 7.5.