Question

explain the role of the following in the process of digestion in human (1) saliva (2) Gastric juices (3) Trypsin​

Answer 1

Saliva: It helps in formation of bolus .Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin.

Gastric juice: It is the mixture of all three glands secretion. The gastric cheif cell of the stomach secrect enzymes for protein breakdown.hydrocholric acid activates pepsinogen into the enzyme pepsin which helps digestion by breaking down the bounds linking amino acids a process known as proteolysis.

tryspin: It is the proteolytic enzymes .It helps in breaking down of protein s into smaller peptides .

Answer 2

Answer:

Digestion is the process through which complex substances are broken down into simpler ones to produce energy for various metabolic processes. There are various enzymes and secretary juices (chemicals) which help in the breakdown of several complex molecules.

Explanation:

The role of sailva, gastric juice and trypsin are as follows:

1. Saliva: Saliva is secreted through the small pores present below the tongue.  These pores contain salivary glands which secrete the saliva. Saliva is a liquid that contains salivary amylase enzymes which helps in proper food mixing and conversion of starch into sugar (maltose). Saliva also helps in engulfing the food items and mobilizing  them towards the oesophagus. It also neutralizes the harmful acids and kills bacteria that cause tooth decay.

2. Gastric juices: It is secreted in the stomach and is composed of HCl + pepsin +  lipases. It helps in digestion of proteins and fats. It also kills the harmful bacteria and helps in the digestion of fats. It helps in the breakdown of complex food materials and sends them to the small intestine.

3. Trypsin is a proteolytic enzyme that functions in basic medium and digests the proteins and converts them into amino acids in duodenum. It is produced by the pancreas in inactivated form which is called trypsinogen.  Trypsinogen gets  activated in the alkaline medium of the small intestine and converted into trypsin.

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