Role of HCl

Q.

What will happen if the oxyntic cells of gastric glands get damaged?

Q. What is the use of HCl secreted by the stomach?

1. Converts pepsin to pepsinogen
2. Does not help in the digestion of protein
3. Converts pepsinogen to pepsin
4. Helps in the survival of bacteria

Q. Assertion- pH of the stomach is more than 7.
Reason- Stomach contains oxyntic cells that produce HCl.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. The assertion is false but the reason is true
4. Both assertion and reason are false

Q.

Identify the steps (denoted by numerals) in physiology of digestion in stomach.

i).Food $\stackrel{HCl}{\underset{KillsBacteria}{⟶}}$ Chyme

ii).Pepsinogen Prorennin $\stackrel{HCl}{\underset{Activation}{⟶}}$ Pepsin Rennin

iii).Proteins $\stackrel{Pepsin}{⟶}$ Proteases Peptones

iv).Milk Casein $\stackrel{Rennin}{⟶}$Para casein $\stackrel{Calcium}{⟶}$ Calcium paracaseinate

1. i). Acidification ii). Activation by HCl iii). Digestion iv). Digestion of Milk in infants
2. i). Deactivation ii). Acidification iii). Activation by HCl iv). Digestion
3. i). Activation by HCl ii). Digestion iii). Deactivation iv). Acidification
4. i). Digestion ii). Deactivation iii). Acidification iv). Activation by HCl

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

1. i) Acidification ii) Activation by HCl iii) Digestion iv) Deactivation
2. i) Deactivation ii) Acidification iii) Activation by HCl iv) Digestion
3. i) Activation by HCl ii) Digestion iii) Deactivation iv) Acidification
4. i) Digestion ii) Deactivation iii) Acidification iv) Activation by HCl

Q. If HCl is not secreted by the parietal cells, then the possible effect will be ____________.

1. no activation of pepsinogen
2. presence of acidic condition
3. no activation of trypsionogen
4. All of the above