Biology : Digestion and Absorption

Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.

Answer briefly 

(c) What are the basic layers of the wall of alimentary canal?

Name different types of teeth and their number in an adult human.

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

• illeocaecal valve

• Pyloric sphincter

• Sphincter of Oddi

• Sphincter of Oddi

In the stomach, gastric acid is secreted by the

• parietal cells

• peptic cells

• acidic cells

• acidic cells

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

• Column I	Column II
  Glycine and glucose	Small intestine and active absorption

• Column I	Column II
  Fructose and Na+	Small intestine passive absorption

  Column I	Column II
  Glycine and glucose	Small intestine and active absorption

• Column I	Column II
  Glycerol and Fatty acids	Duodenum and move as chilomicrons

• Column I	Column II
  Glycerol and Fatty acids	Duodenum and move as chilomicrons

The guta of cow and buffalo possess

• Fucus sp

• Chlorella sp

• Methanogens

• Methanogens

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

• Canine

• Premolars

• Molars

• Molars

The enzyme that is not present in succus entericus is

• maltase

• nucleases

• nucleosidase

• nucleosidase