In the stomach, gastric acid is secreted by the:-
(a) parietal cells
(b) peptic cells
(c) acidic cells
(d) gastrin secreting cells
The primary dentition in human differs from permanent dentition in not having one of the following type of teeth
The enzyme that is not present in succus entericus is
Which of the following statement is not correct ?
(a) Brunner's glands are present in the submucosa of stomach and secret pepsinogen.
(b) Goblet cells are present in the mucosa of intestine and secret mucus.
(c) Oxyntic cells are present in the mucosa of stomach and secret HCl.
(d) Acinic are present in the pancreas and secrete carboxypeptidase
Gastric juice of infants contains?
(a) maltase, pepsinogen, rennin
(b) nuclease, pepsinogen, lipase
(c) pepsinogen, lipase, rennin
(d) amylase, rennin, pepsinogen
Which of the following enzymes carries out the initial step in the digestion of milk in humans?
Which one of the following statement is false regarding digestion and absorption of food in humans?
(a) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
(b) Glucose and amino acids are absorbed with the help of carrier ions like Na+.
(c) Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries.
(d) About 30% of starch is hydrolysed by salivary amylase in our mouth.
What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
(a) Gastric juice will be deficient in chymosin
(b) Gastric juice will be deficient in pepsinogen
(c) In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
(d) Enterokinase will not be released from the duodenal mucosa and so trypsinogcn is not converted to trypsin
Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?
(a) Duodenum :Triglycerides→Trypsin→Monoglycerides
(b) Small intestine :Starch→α-amylase→Disaccharide (maltose)
(C) Small intestine :Proteins→Pepsin→Amino Acids
(d) Stomach :Fats→ Lipase→Micelles
The following is a scheme showing the fate of carbohydrates during digestion in the human alimentary canal. Identify the enzymes acting at stages indicated as A, B, C and D. Choose the correct option from those given.
(a) A = Amylase, B = Maltase, C = Lactase,D = Invertase
(b) A = Amylase, B = Maltase, C = Invertase,D = Lactase
(c) A = Amylase, B = Invertase, C = Maltase, D = Lactase
(d) A = Amylase, B = Lactase, C = Maltase, D = Invertase