Which one of the following statement is false regarding digestion and absorption of food in humans?
1. Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
2. Glucose and amino acids are absorbed with the help of carrier ions like Na+.
3. Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries.
4. 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?
1. Gastric juice will be deficient in chymosin
2. Gastric juice will be deficient in pepsinogen
3. In the absence of HCl secretion, inactive pepsinogen is not converted into the active
enzyme pepsin
4. Enterokinase will not be released from the duodenal mucosa and so trypsinogcn is not
converted to trypsin
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.
1. A = Amylase, B = Maltase, C = Lactase,D = Invertase
2. A = Amylase, B = Maltase, C = Invertase,D = Lactase
3. A = Amylase, B = Invertase, C = Maltase, D = Lactase
4. A = Amylase, B = Lactase, C = Maltase, D = Invertase
Which of the following gastric secretions is correctly matched with its source?
(1) Pepsin-Chief cells
(2) Chymotrypsin-Parietal cells
(3) HCl-Goblet cells
(4) Mucus-Oxyntic cells
In mammals, the teeth are.
I. only two sets, present throughout life.
II. embedded in the socket of the jaw bones.
III. different types.
These conditions are respectively referred as
1. diphyodont, heterodont and thecodont
2. diphyodont, thecodont and heterodont
3. the codont, diphyodont and heterodont
4. the codon, heterodont and diphyodont
Brunner's gland are characteristic feature of:-
(1) jejunum of small intestine
(2) ileum
(3) duodenum
(4) fundic region of stomach
The pH of stomach is 1.6, then which enzyme will digest protein ?
(1) Trypsin
(2) Pepsin
(3) Amylase
(4) Erypsin
Which of the following components of our food are taken in small quantities?
(1) Carbohydrate and proteins
(2) Proteins and minerals
(3) Proteins and lipids
(4) Minerals and vitamins
Frenulum is:
(1) Adenoid present on pharyngeal wall
(2) Tonsils located on lateral wall of soft palate
(3) Fold attaching tongue to the floor of oral cavity
(4) V-shaped sulcus for terminalis on tongue
The hard chewing surface of teeth helping in mastication of food is called:
(1) Dentine
(2) Frenulum
(3) Root
(4) Enamel