Which of the following is not a factor that helps create the stomach mucosal barrier?

Which of the following is not a factor that helps create the stomach mucosal barrier?

Which of the following is not a factor that helps create the stomach mucosal barrier? 









A) thick coating of bicarbonate-rich mucus
B) tight junctions of epithelial mucosa cells
C) replacing of damaged epithelial mucosa cells
D) rennin










Answer: D