The enzyme enterokinase helps in the conversion of 

1.  trypsinogen into trypsin

2.  caseinogen into casein

3.  pepsinogen into pepsin

4.  protein into polypeptides 

Identify the correct statement with reference to human digestive system

1. Serosa is the innermost layer of the alimentary canal.

2. Ileum is a highly coiled part.

3. Vermiform appendix arises from duodenum.

4. Ileum opens into small intestine.

The intrinsic factor that helps in the absorption of vitamin ${\mathrm{B}}_{12}$ is secreted by:

1. Goblet cells

2. Hepatic cells

3. Oxyntic cells

4. Chief cells

The proteolytic enzyme rennin is found in:

1. Intestinal juice

2. Bile juice

3. Gastric juice

4. Pancreatic juice

Kwashiorkor disease is due to:

Match the items given in Column - I with those in Column - II and choose the correct option:

Succus entericus is referred to as:

1. Gastric juice

2. Chyme

3. Pancreatic juice

4. Intestinal juice

Sphincter of Oddi is present at :
1. Gastro-oesophageal junction
2. Junction of jejunum and duodenum
3. Ileo-caecal junction
4. Junction of hepato-pancreatic duct and duodenum

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

1. Duodenal cells

2. Chief cells

3. Goblet cells

4. Oxyntic cells

Match the following structures with their respective location in organs:

Select the correct option from the following: