Which lipoprotein transports dietary triglycerides from the intestine?

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Multiple Choice

Which lipoprotein transports dietary triglycerides from the intestine?

Dietary triglycerides from a meal are absorbed by enterocytes, reassembled into triglycerides, and packaged into lipoprotein particles called chylomicrons. These particles, formed in the intestinal cells, are rich in apoB-48 and acquire apoC-II and apoE. They are released into the lymphatic system and eventually reach the bloodstream via the thoracic duct. In circulation, lipoprotein lipase—activated by apoC-II—hydrolyzes the triglycerides in chylomicrons, delivering fatty acids to adipose and muscle tissue. The remaining chylomicron remnants, enriched in cholesterol, are taken up by the liver via apoE-mediated receptors. This pathway specifically carries dietary triglycerides, unlike LDL (cholesterol delivery to tissues), HDL (reverse cholesterol transport), or VLDL (endogenous triglycerides from the liver).

Dietary triglycerides from a meal are absorbed by enterocytes, reassembled into triglycerides, and packaged into lipoprotein particles called chylomicrons. These particles, formed in the intestinal cells, are rich in apoB-48 and acquire apoC-II and apoE. They are released into the lymphatic system and eventually reach the bloodstream via the thoracic duct. In circulation, lipoprotein lipase—activated by apoC-II—hydrolyzes the triglycerides in chylomicrons, delivering fatty acids to adipose and muscle tissue. The remaining chylomicron remnants, enriched in cholesterol, are taken up by the liver via apoE-mediated receptors. This pathway specifically carries dietary triglycerides, unlike LDL (cholesterol delivery to tissues), HDL (reverse cholesterol transport), or VLDL (endogenous triglycerides from the liver).

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