This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Physiology
[{'content': 'Parasympathetic stimulation induces salivary acinar cells to release the protease: \nSelect and explain. \nA. Bradykinin, B. Kallikrein, C. Kininogen, D. Kinin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. KallikreinParasympathetic stimulation induces the release of kallikrein by the salivary acinar cells, which converts kininogen to form lysyl-bradykinin (a potent vasodilator). Bradykinin is a vasoactive peptide. Kininogen is the precursor for kinins. Kinins include bradykinin and lysyl-bradykinin. Aminopeptidase releases amino acids from the amino end of peptides and is found in the brush border membrane and cytoplasm of enterocytes', 'role': 'assistant'}]