amylase in the mouth pepsin in the stomach lipase in the small intestine trypsin in the small intestine
I gave my students this multiple choice question: Which enzyme acts first in response to the ingestion of a hamburger patty?

Only one answer is correct among these 4 choices:
- amylase in the mouth
- pepsin in the stomach
- lipase in the small intestine
- trypsin in the small intestine

Could you tell me which one is correct?

pepsin in the stomach