Question

digestive action of pepsin comes to a stop when food reaches small intestine. justify ?

Answer 1

pepsin Is formed By pepsinogen which is converted into pepsin on mixin with HCL..now See For Pepsinogen Is Inactive It reQuire A acidic Medium To convert Into Pepsin and Hcl has PH 1.8

So basically Pepsin is Acidic and small intestine ph is 6.8 Hence Acidic pepsin doesn't act in small intestine due to alkaline ph.

Answer 2

Explanation:

The digestive system includes pepsin mainly to digest the protein. The pepsin stops reacting in the small intestine due to the alkaline nature of the small intestine with ph. value of 6.5.

The pepsinogen in inactive form converts into pepsin by reacting with HCl in the stomach which is acidic and hence it helps indigestion. Hence the pepsinogen requires the acidic ph. to convert in pepsin and hence finally aid indigestion.