Do intestinal enterocytes re-esterify absorbed fatty acids into triglycerides and package them into chylomicrons for secretion?

Do intestinal enterocytes re-esterify absorbed fatty acids into triglycerides and package them into chylomicrons for secretion?

• A. True
• B. False
• C. It happens in the liver
• D. It only occurs for cholesterol

Answer: (A)

Absorbed dietary fats are handled by intestinal enterocytes. After digestion, fatty acids and monoacylglycerols are taken up by enterocytes and re-esterified to form triglycerides. These triglycerides are then packed with apolipoproteins (such as ApoB-48) and phospholipids to form chylomicrons, which are secreted into the lymphatic system and ultimately reach the bloodstream to deliver dietary fat to tissues. Short-chain fatty acids can go directly into the portal blood and don’t require chylomicron formation. The liver handles endogenous triglycerides and VLDL assembly, not the initial dietary fat packaging. So the statement is true.

Absorbed dietary fats are handled by intestinal enterocytes. After digestion, fatty acids and monoacylglycerols are taken up by enterocytes and re-esterified to form triglycerides. These triglycerides are then packed with apolipoproteins (such as ApoB-48) and phospholipids to form chylomicrons, which are secreted into the lymphatic system and ultimately reach the bloodstream to deliver dietary fat to tissues. Short-chain fatty acids can go directly into the portal blood and don’t require chylomicron formation. The liver handles endogenous triglycerides and VLDL assembly, not the initial dietary fat packaging. So the statement is true.