Explain the process of digestion of the following food items mentioning the role of specific enzymes and the part of elementary canal where it occurs 1. Egg White 2. Butter 3. Boiled rice
Answers
The the process of digestion in the following food items mention the role of specific enzymes and the part of alimentary canal occurs as follows :
- Egg white
Egg white mainly contains water and proteins. so, protein is digested in the stomach.stomach contains gastric gland in the epithelial lining of it. this gastric gland secretes gastric juice which contains pepsin, hydrochloric acid and mucus. hydrochlorichydrochloric acid helps in killing the bacteria present in food and also helps in the activation of pepsin,mucus forms a lining of the epithelial wall so that the hydrochloric acid will will not destroyed the stomach wall, pepsin is enzyme present in gastric juice it helps in the digestion of proteins or converting the proteins into peptones. gastric juice also contain another enzyme namely renini. itit is mainly present in infant it helps in the curdling of milk or convert the casin protein into peptones.
2. Butter
butter mainly contains fat which is digested which is digested in the duodenum of small intestine.the bile duct is connected to the duodenum of small intestine which comes from the liver. liver is an organ which secretes bile juice which is stored in gallbladder.bile juice helps in making the acidic food coming from stomach alkaline and also emulsifies the fats or convert the fats into fatty acids and glycerol.
3. Boiled rice
boiled rice contain carbohydrate or starch which is digested in mouth as well as in the duodenum and ileum of small intestine. mouth contains salivary glands which secretes saliva .there are three pairs of salivary glands submaxillary salivary glands, sublingual salivary gland and parotid salivary gland. submaxillary salivary glands are present on the lower jaws, sublingual are present below the tongue and parotid present in the cheeks. salivary gland secrete saliva which contains salivary amylase .it is an enzyme which converts starch into maltose. now, duodenum contains pancreas which is also known as mixed gland because it secretes hormones as well as digestive juice. pancreas secrets pancreatic juice which contains amylase trypsin and lipase .trypsin helps in the conversion of proteins into peptones and peptides. lipase helps in the digestion of fats or converting the fats into fatty acids and glycerol and amylase helps in converting the starch into maltose . now digestion in ileum. ileum contains intestinal gland which which secretes intestinal juice called succus entericus the enzymes present in which juice works in alkaline medium. the enzymes present in succus entericus are
trypsin, Maltase, sucrase, lipase, lactase.
trypsin helps in converting peptones into amino acids . Maltase helps in the conversion of maltose into glucose. lactase helps in the conversion of lactose into glucose .sucrase helps in the conversion of sucrose into glucose and fructose . lipase helps in the conversion of fats into fatty acid and glycerol .thus the digestion of food completes.
Digestion of the Egg white:
The egg white contains protein and water. So it will be digested in the stomach. The gastric gland of the stomach contains enzyme pepsin, hydrochloric acid, mucus. When food enters in the stomach then hydrochloric acid kills the bacteria of the food and helps to active the pepsin and then the enzyme pepsin convert the protein to peptones.
Digestion of the Butter:
The butter contains fat which is digested in the duodenum (small intestine). Liver is the responsible to secrete bile juice which stores in the gallbladder. The bile duct is connected from the liver to the duodenum and bile juice helps to convert the fat to fatty acid, glycerol.
Digestion of the Boiled rice:
The boiled rice is the carbohydrate and this digestion of the carbohydrate is started from the mouth and then duodenum and ileum. In the mouth there is saliva which contains amylase enzyme which converts starch to the maltose.
Then the duodenum contains pancreas which is said to mixed gland and can produce enzyme like amylase, lipase and trypsin. After the duodenum then the process starts in the ileum where enzymes like trypsin, sucrase, maltase, lipase, and lactase are present. Here maltase helps to convert the maltose to glucose.