18 Questions
What is the primary function of chylomicrons in the body?
To make fats soluble and deliver TAGs to tissues
How are absorbed lipids utilized by tissues?
Through multiple pathways, including oxidation, gluconeogenesis, and lipogenesis
What is the main component of the hydrophobic core of chylomicrons?
Cholesteryl ester
What is the primary site of lipid absorption?
Mucosal cells
What is the term for the presence of excess bulky, whitish, and offensive fat in stool?
Steatorrhea
What is the function of apo A and apo B-48 proteins in chylomicrons?
To facilitate lipid transport
What is a possible cause of deficiency of pancreatic lipase?
Chronic pancreatitis
What is the function of Orlistate?
Inhibit lipases to decrease fat absorption
What is the normal range of total plasma lipids?
400-700 mg/dL
What is the hydrophobic core of lipoproteins composed of?
Triacylglycerols and cholesteryl esters
What is the purpose of measuring the proportion of HDL and LDL?
To assess cardiovascular disease risk
What is the consequence of bile salt deficiency?
Decreased lipid digestion
Which lipase is the main digestive enzyme in adults?
Pancreatic lipase
What is the primary function of pancreatic lipase?
Hydrolyzing triacylglycerol at position 1 and 3
What are the components of micelles?
2-MAG, long chain FAs, phospholipids, lysophospholipids, cholesterol, fat soluble vitamins, and bile salts
Where do long chain fatty acids get esterified in intestinal epithelial cells?
To reform triacylglycerol
What is the fate of bile salts, glycerol, and short and medium chain fatty acids in the intestinal epithelial cells?
They are transported via the portal blood to the liver
What is the role of intestinal lipase?
Hydrolyzing 1-MAG glycerol + FA intracellularly
This quiz covers the digestion of lipids, including triglycerides, cholesterol, and phospholipids, and the different lipases involved in each process. Learn about the role of lingual lipase, gastric lipase, and pancreatic lipase in lipid digestion.
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