AP BIOLOGY

Detailed explanation-1: -Lipoproteins in blood plasma have been intensively studied because they are the mode of transport for cholesterol through the bloodstream and lymphatic fluid. Cholesterol is insoluble in the blood, and so it must be bound to lipoproteins in order to be transported.

Detailed explanation-2: -Triglycerides and cholesteryl esters are transported in the core of plasma lipoproteins. The intestine secretes dietary fat in chylomicrons, lipoproteins that transport triglyceride to tissues for storage.

Detailed explanation-3: -High-density lipoprotein (HDL) is the “good cholesterol.” It carries cholesterol back to your liver to be flushed out of your body. High levels of HDL reduce your risk of cardiovascular (heart) disease.

Detailed explanation-4: -Cholesterol is transported by complex particles, called lipoproteins, which have specific proteins on their surface. These proteins, called apolipoproteins, have an essential function in the metabolism of lipoproteins.

Detailed explanation-5: -Lipoproteins transport cholesterol and fatty acids throughout the body. Cholesterol is a major constituent of every mammalian cell membrane and the backbone of steroid hormones, while fatty acids are the major fuel of many organs.