Long Answer TypeDiscuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.
Short Answer TypeLong Answer TypeButter is a fat product and gets digested in the small intestine. The bile juice secreted by the liver contains bile salts that break down large fat globules into smaller globules, so as to increase their surface area for the action of lipase. This process is referred to as emulsification of fats.
After this, the pancreatic lipase present in the pancreatic juice and the intestinal lipase present in the intestinal juice hydrolyse the fat molecules into triglycerides, diglycerides, monoglycerides, and ultimately into glycerol.
Absorption of fats:
Fat absorption is an active process. During fat digestion, fats are hydrolysed into fatty acids and glycerol. However, since these are water insoluble, they cannot be directly absorbed by the blood. Hence, they are first incorporated into small droplets called micelles and then transported into the villi of the intestinal mucosa.
They are then reformed into small microscopic particles called chylomicrons, which are small, protein-coated fat globules. These chylomicrons are transported to the lymph vessels in the villi. From the lymph vessels, the absorbed food is finally released into the blood stream and from the blood stream, to each and every cell of the body.
Short Answer Type
Multiple Choice QuestionsWhich 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 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
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