Digestion and Absorption

Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by

1. Ileo-caecal valve
2. Gastro-oesophageal sphincter
3. Pyloric sphincter
4. Sphincter of Oddi

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

Which of the following functions is not performed by secretions from salivary glands?

1. Control bacterial population in mouth
2. Digestion of complex carbohydrates
3. Lubrication of oral cavity
4. Digestion of disaccharides

Role of enamel is to

1. Give basic shape to the teeth
2. Connect crown of tooth with its root
3. Masticate the food
4. Form bolus

Choose the incorrect enzymatic reaction:

1. Dipeptides Dipeptidases Amino acids
2. Maltose Maltase Glucose + Fructose
3. Sucrose Sucrase Glucose + Fructose
4. Lactose Lactase Glucose + Galactose

Succus entericus is referred to as :

1. Chyme
2. Pancreatic juice
3. Intestinal juice
4. Gastric juice

Sphincter of Oddi is present at :

1. Junction of jejunum and duodenum
2. Ileo-caecal junction
3. Junction of hepato-pancreatic duct and duodenum
4. Gastro-oesophageal junction

Identify the correct statement with reference to human digestive system.

1. Ileum opens into small intestine
2. Vermiform appendix arises from duodenum
3. Serosa is the innermost layer of the alimentary canal
4. Ileum is a highly coiled part

The enzyme enterokinase helps in conversion of

1. pepsinogen into pepsin
2. protein into polypeptides
3. trypsinogen into trypsin
4. caseinogen into casein

Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes.

1. Oxyntic Cells
2. Duodenal Cells
3. Chief Cells
4. Goblet Cells

Which of the following terms describe human dentition?

1. Pleurodont, Monophyodont, Homodont
2. Thecodont, Diphyodont, Homodont
3. Pleurodont, Diphyodont, Heterodont
4. Thecodont, Diphyodont, Heterodont

Which of the following gastric cells indirectly help in erythropoiesis?

1. Mucous cells
2. Parietal cells
3. Chief cells
4. Goblet cells

Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme?

1. Paneth cells
2. Zymogen cells
3. Kupffer cells
4. Argentaffin cells

Which of the following options best represents the enzyme composition of pancreatic juice?

1. Amylase, Pepsin, Trypsinogen, Maltase
2. Peptidase, Amylase, Pepsin, Rennin
3. Lipase, Amylase, Trypsinogen, Procarboxypeptidase
4. Amylase, Peptidase, Trypsinogen, Rennin

A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?

1. Canines
2. Pre-molars
3. Molars
4. Incisors

Which of the following guards the opening of hepatopancreatic duct into the duodenum?

1. Pyloric sphincter
2. Sphincter of Oddi
3. Semilunar valve
4. Ileocaecal valve

In the stomach, gastric acid is secreted by the

1. peptic cells
2. acidic cells
3. gastrin secreting cells
4. parietal cells.

The enzyme that is not present in succus entericus is

1. nucleosidase
2. lipase
3. maltase
4. nuclease.

The primary dentition in human differs from permanent dentition in not having one of the following type of teeth.

1. Molars
2. Incisors
3. Canines
4. Premolars

Gastric juice of infants contains

1. pepsinogen, lipase, rennin
2. amylase, rennin, pepsinogen
3. maltase, pepsinogen, rennin
4. nuclease, pepsinogen

Which of the following statements is not correct?

1. Oxyntic cells are present in the mucosa of stomach and secrete HCl.
2. Acini are present in the pancreas and secrete carboxypeptidase.
3. Brunner's glands are present in the submucosa of stomach and secrete pepsinogen.
4. Goblet cells are present in the mucosa of intestine and secrete mucus.

The initial step in the digestion of milk in humans is carried out by

1. lipase
2. trypsin
3. rennin
4. pepsin.

Fructose is absorbed into the blood through mucosa cells of intestine by the process called

1. active transport
2. facilitated transport
3. simple diffusion
4. co-transport mechanism.

Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.

1. array|l|l| Column I & Column II \ Glycerol, fatty acids & Duodenum, move as chylomicrons \ array
2. array|l|l| Column I & Column II \ Cholesterol, maltose & Large intestine, active absorption \ array
3. array|l|l| Column I & Column II \ Glycine, glucose & Small intestine, active absorption \ array
4. array|l|l| Column I & Column II \ Fructose, Na+ & Small intestine, passive absorption \ array

A healthy person eats the following diet – 5 g raw sugar, 4 g albumin, 10 g pure buffalo ghee adulterated with 2 g vegetable ghee (hydrogenated vegetable oil) and 5 g lignin. How many calories he is likely to get?

1. 126
2. 164
3. 112
4. 144

Which enzymes are likely to act on the baked potatoes eaten by a man, starting from the mouth and as it moves down the alimentary canal?

1. Pancreatic amylase Salivary amylase Lipases
2. Disaccharidase like maltase Lipases Nucleases
3. Salivary amylase Pancreatic amylase Disaccharidases
4. Salivary maltase Carboxy peptidase Trypsinogen

Where do certain symbiotic microorganisms normally occur in human body?

1. Caecum
2. Oral lining and tongue surface
3. Vermiform appendix and rectum
4. Duodenum

Anxiety and eating spicy food together in an otherwise normal human, may lead to

1. indigestion
2. jaundice
3. diarrhoea
4. vomiting

One of the constituents of the pancreatic juice which is poured into the duodenum in humans is

1. trypsinogen
2. chymotrypsin
3. trypsin
4. enterokinase

Which one of the following correctly represents the normal adult human dental formula?

1. 33, 11, 32, 11
2. 22, 11, 32, 33
3. 22, 11, 22, 33
4. 33, 11, 33, 33