12 Questions
Where does most of the triglyceride (TG) hydrolysis occur?
Small intestine
What is the major fat-digesting enzyme involved in TG hydrolysis?
Pancreatic lipase
What are the products formed after the hydrolysis of TGs by pancreatic lipase?
Monoglycerides and two fatty acids
How are lipids absorbed into the intestinal cells?
Small molecules diffuse directly, while large molecules form micelles
What are the transport vehicles that carry lipids from the intestinal cells to the rest of the body?
Chylomicrons
How do chylomicrons enter the bloodstream?
Through the thoracic duct near the heart
What is the main role of lingual lipase in adults?
It plays a minor role in fat digestion in adults.
What is the role of cholecystokinin (CCK) hormone in lipid digestion?
CCK signals the gallbladder to release its storage of bile.
What is the main function of bile acids in lipid digestion?
Bile acids act as emulsifiers, drawing fat molecules into the watery fluids.
Where does the majority of fat digestion take place?
In the small intestine, due to the action of pancreatic and intestinal lipases.
What is the main challenge the body faces in digesting and absorbing lipids?
Lipids are hydrophobic, and tend to separate from the watery fluids of the GI tract.
What is the approximate amount of triglycerides, phospholipids, and cholesterol received by the GI tract every day?
50-100 g of triglycerides, 4-8 g of phospholipids, and 200-350 mg of cholesterol.
Learn about the challenges the body faces in digesting and absorbing fats, and how the process of fat digestion starts in the mouth with lingual lipase. Understand the interaction between hydrophobic fats and hydrophilic enzymes.
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