Final answer:
Chylomicrons are the class of plasma lipoproteins formed in intestinal cells when triglycerides are combined with protein. They transport lipids through the lymphatic system and bloodstream and are broken down to release free fatty acids and glycerol.
Step-by-step explanation:
Answer:
The class of plasma lipoproteins that is formed in intestinal cells when triglycerides are combined with protein is chylomicrons. Chylomicrons are water-soluble lipoproteins that transport triglycerides, phospholipids, cholesterol, and proteins through the lymphatic system and into the bloodstream. They are too big to pass through the basement membranes of blood capillaries, so they enter the large pores of lacteals and then travel through the lymphatic vessels.
Once in the bloodstream, chylomicrons are broken down by the enzyme lipoprotein lipase, releasing free fatty acids and glycerol. The breakdown products can be used for energy by cells or stored in adipose tissue as fat. Liver cells combine the remaining chylomicron remnants with proteins to form lipoproteins that transport cholesterol in the blood.