NEET 2008
- Exam
- NEET
- Year
- 2008
- Subject
- Zoology
- Chapter
- Digestion and Absorption
NEET 2008 · Zoology · Digestion and Absorption
What will happen if the secretion of parietal cells of gastric...
What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
Options
- AGastric juice will be deficient in chymosin
- BGastric juice will be deficient in pepsinogen
- CIn the absence of secretion, inactive pepsinogen is not converted into the active enzyme pepsin
- DEnterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin
Correct answer
C. In the absence of secretion, inactive pepsinogen is not converted into the active enzyme pepsin
Step-by-step solution
Gastric glands are numerous microscopic tubular glands formed by the epithelium of stomach. The parietal cells (oxyntic cells) are large and most numerous on the side walls of gastric glands. They secrete hydrochloric acid and castle intrinsic factor. The peptic cells (zymogen) cells of gastric glands secrete gastric digestive enzymes as proenzymes-pepsinogen and prorennin and small amount of gastric amylase and gastric lipase. The hydrochloric acid maintains a strongly acidic of about 1.5 to 2.5 in the stomach. HCl converts pepsinogen and prorennin to pepsin and rennin respectively. The secretion of intestinal glands is called succus entericus. It contains many enzymes, maltase, lactase, sucrase, enterokinase, nucleotidase etc. The enterokinase converts proenzyme trypsinogen into active trypsin.