Digestion and Absorption · Question 1

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