Digestion Process in human - PowerPoint Presentation

Slide1

Digestion Process

in human (SI and LI)

Presented by

Dr

Sanjoy

Deka

Complete digestion in small intestine

Pancreatic

lipaseTrypsinogen is activated to trypsin by the enzyme enterokinase released from intestinal gland. Trypsin in-turn activates other proteases.

Emulsification of FatsNeutralization of acidic food entering small Intestine.Providing alkalic medium of digestion in SI

Function of bile juice

Erepsin

may contain enzymes like dipeptidases, aminopeptidases etcEnzymes Maltase, lactase and sucrase are called disaccharidases

Sucrose

Summary in SI

The large intestine performs the vital functions of absorbing water, converting food into faeces and absorbing essential vitamins produced by gut bacteria. A slurry of digested food, known as chyme, enters the large intestine from the small intestine via the ileocaecal sphincter.

Large Intestine

Questions?What are the simplest digestive product of carbohydrate, fats and protein?What are enzymes? Name any one enzyme and write it’s function.

Name the enzyme present in saliva, what is its role in digestion?What is the function of mucus secreted gastric gland?Name the sphincter which regulates the exit of food from the stomach.Give the functions of hydrochloric acid for the body. or what is the role of acid in our stomach?What is emulsification of fats?Name the finger like projections of small intestine and what is the necessity of such type of projections in digestive system?What is the role of pepsin in stomach?Why pancreas is called mixed gland

?

Give two functions of bile juice, from which organ it is released

?

Name any three important enzymes of pancreas and the food component on which they act

.

Which protein digesting enzyme is present in pancreatic juice?

Where from intestinal juice come to the small intestine

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In human alimentary canal, name the site of complete digestion of various components of food

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Lipase solution was added to milk. After 30 minutes the milk had become more acidic. What were the substrate and end product in this reaction? Ans: Substrate is fat. End products are fatty acid and glycerol.)What

is the food called when food blends completely with acidic gastric juices of the stomach by the churning movements of the muscular wall?Ans: The food stays in the stomach for 4-5 hours during which it gets blended completely with the acidic gastric juice present in the stomach through churning movements of the muscular walls. At this point, the food is referred to as chyme.19. Define the following terms–Bolus, Mastication and Digestive Enzymes.Bolus– It is round, ball-shaped and a mixture of a chewed food formed by the combination of food and saliva in the mouth or alimentary canal.Mastication– It is the act of chewing the food. In this process, the food particles are broken down into smaller and soluble particles for ease of swallowing. This process occurs inside the oral cavity, including the teeth, tongue and the cheek.

MCQWhich of the following is not a digestive enzyme contained in the pancreatic juice?i. Lipaseii. Hydrochloric acidiii. Mucusiv.

Trypsin a) (i) and (ii)          b) (i) and (iv)          c) (ii) and (iii)          d) (i) and (iii)Ans: C)

2. The enzymes pepsin and trypsin are secreted respectively bya) Stomach and pancreasb) Salivary gland and stomachc) Liver and pancreasd) Liver and salivary gland3. The enzymes contained in pancreatic juices help in the digestion of:

a) Fats and carbohydratesb) Proteins and fatsc) Proteins and carbohydratesd) Proteins, fats and carbohydrates