Question

Identify the missing options regarding the physiology of digestion in the stomach:
$$\begin{array}{ccc}\text{Secretion}& \text{Action}& \text{Product}\\ \text{Salivary amylase}& \text{i)}& \text{Decrease of pH by HCl}\\ \text{HCl}& \text{ii)}& \text{Chyme}\\ \text{Pepsinogen, Prorennin}& \text{iii)}& \text{Pepsin, rennin}\\ \text{Proteins}& \text{iv)}& \text{Proteoses and Peptones}\end{array}$$

• A. i) Acidification ii) Activation by HCl iii) Digestion iv) Deactivation
• B. i) Deactivation ii) Acidification iii) Activation by HCl iv) Digestion
• C. i) Activation by HCl ii) Digestion iii) Deactivation iv) Acidification
• D. i) Digestion ii) Deactivation iii) Acidification iv) Activation by HCl

Answer 1

The correct option is B i) Deactivation ii) Acidification iii) Activation by HCl iv) Digestion

In the context of Physiology of digestion in the stomach, the major changes occurring are:

i). Deactivation of salivary amylase by HCl that decreases the pH level to 2.

ii). Acidification of food to kill the bacteria and turn it into Chyme.

iii). Activation of inactive enzymes like Pepsinogen and Prorennin into Pepsin and Rennin

iv). Digestion of proteins by Pepsin and Renin to break them down into intermediates like Proteoses and peptones.

So the correct option is: B. i) Deactivation, ii) Acidification, iii) Activation by HCl, and iv) Digestion