In humans, what is the sequence of fat digestion from the lumen of the small intestine to the bloodstream?
A) lipids → fatty acid and glycerol (converted in liver) → bloodstream
B) lipids → fatty acid and glycerol (converted in lacteal) → bloodstream
C) lipids → fatty acid and glycerol (converted in epithelial cell) → bloodstream
D) lipids → fatty acid and glycerol (converted in epithelial cell) → lacteal → bloodstream
E) lipids → fatty acid and glycerol (converted in liver) → lacteal → bloodstream

Question

Quizplus · Accepted Answer

The sequence of fat digestion in humans involves the breakdown of lipids into fatty acids and glycerol. This process occurs in the lumen of the small intestine and the fatty acids and glycerol are absorbed into the epithelial cells lining the small intestine. Inside the epithelial cells, the fatty acids and glycerol are reassembled into triglycerides, which are too large to be absorbed directly into the bloodstream. Instead, they are packed into chylomicrons and released into the lacteal, a lymphatic vessel. From there, the chylomicrons are transported through the lymphatic system and eventually enter the bloodstream, where they can be used for energy or stored in adipose tissue. Therefore, choice D is the correct sequence of fat digestion in humans.

In Humans, What Is the Sequence of Fat Digestion from the Lumen