What is not a factor that helps create the stomach mucosal barrier?

Option D, Rennin

Explanation:

Options

A) replacing of damaged epithelial mucosa cells

B) tight junctions of epithelial mucosa cells  

C) thick coating of bicarbonate-rich mucus  

D) rennin

Solution

The gastric mucosal barrier is made up of three major elements –  

a)Submucosal Elements

b)Epithelial Elements

c)Mucus Elements

The mucosa of the stomach gets exposed to the highly corrosive acidity of gastric juice due to which there is a risk of self-digestion of the stomach due to acidity.  

Mucosal barrier prevent the stomach from self-digestion

The components of this layer include  

a)Thick coating of bicarbonate-rich mucus on the stomach wall – restricts the neutralization of bicarbonate ions as mucus acts as a physical barrier

b)The epithelial cells of the tight junction of the stomach’s mucosa block entry of gastric juice  

c)Gastric glands joining the gastric pits consists of stem cell that replace damaged epithelial mucosal cells

Hence, option D

69 is the correct math for the amino acids