What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
Gastric juice will be deficient in chymosin
Gastric juice will be deficient in pepsinogen
In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
C.
In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
Gastric glands are numerous microscopic tubular glands formed by the epithelium of the stomach.The parietal cells (oxynitic cells) are large and most numberous 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 proennin and a small amount of gastric amylase and gastric lipase. The hydrochloric acid maintains a strongly acidic pH 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 coverts proenzyme trypsinogen into active trypsin.
Which one of the following correctly represents the normal adult human dental formula?
3/3, 1/1, 3/2,/1/1
2/2,1/1,3/2,3/3
2/2, 1/1, 2/2, 3/3
2/2, 1/1, 2/2, 3/3
Which one of the following pairs of food components in humans reaches the stomach totally undigested?
Protein and starch
Starch and fat
Fat and cellulose
Fat and cellulose
Which one of the following statement is true regarding digestion and absorption of food in humans?
Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+
Chylomicrons are small Lipoprotein particles that are transported from the intestine into blood capillaries.
Chylomicrons are small Lipoprotein particles that are transported from the intestine into blood capillaries.
Which one of the following is a fat-soluble vitamin and its related deficiency disease?
Ascorbic acid - Scurvy
Retinol - Xerophthalmia
Cobalamine - Beri-beri
Cobalamine - Beri-beri
Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme?
Argentaffin cells
Paneth cells
Zymogen cells
Zymogen cells
Which one of the following statements is correct with reference to enzymes?
Apoenzyme = Holoenzyme + Coenzyme
Holoenzyme = Apoenzyme + Coenzyme
Coenzyme = Apoenzyme + Holoenzyme
Coenzyme = Apoenzyme + Holoenzyme
Which of the following options best represents the enzyme composition of pancreatic juice?
Amylase, peptidase, trypsinogen, rennin
Amylase, pepsin, trypsinogen, maltase
Peptidase, amylase, pepsin, rennin
Peptidase, amylase, pepsin, rennin
Which of the following terms describe human dentition?
Thecodont, Diphyodont, Homodont
Thecodont, Diphyodont, Heterodont
Pleurodont, Diphyodont, Heterodont
Pleurodont, Monophyodont, Homodont
