Which transports digested lipids and bile across digestive fluids to the surface of mucosal cells? a. LDL'sb. micellesc. HDL'sd. chylomicrons

B. Micelles

Explanation:

Digestion products of lipids such as fatty acids and monoglycerides are hydrophobic. Bile salts make these hydrophobic molecules more soluble. The amphipathic bile salts in intestinal chyme surround them to form tiny spheres called micelles. Each micelle is 2-10 nm in diameter and has almost 20-50 bile salt molecules.

During micelles formation, the hydrophobic regions of bile salts interact with fatty acids and monoglycerides while their hydrophilic regions interact with the watery intestinal chyme. These micelles move from the interior of the small intestinal lumen to the brush border of the absorptive cells where the fatty acids and monoglycerides diffuse out of the micelles into the absorptive cells. The micelles are left behind in the chyme to transport even move digested lipids.