How does butter in your food gets digested and absorbed in the body? | NCERT solution | Class 11 Biology | Unit-16 Digestion and Absorption





Q.11:- How does butter in your food gets digested and absorbed in the body?

 

Answer
Digestion of butter
Butter is mainly composed of fat. Bile juice secreted by the liver contains bile salts break down large fat globules into smaller globules which increases the surface area for the action of lipase. This is known 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 fatty aicds and glycerol.
Absorption of butter
The ultimate products of fat i.e., fatty acids and glycerol is not water soluble so they can’t absorbed the blood directly. Therefore, they are first incorporated into small droplets called micelles and then transported into the villi of the intestinal mucosa. They are re-formed into very small protein coated fat globules called the chylomicrons which are transported into the lymph vessels in the villi. These lymph vessels ultimately release the absorbed substances into the blood stream.